My server randomly acts as if someone/thing did the /stop command. HELP!

[cousinjoshy1]

At random times my server acts as if someone did the /stop command. Funny thing is it never says anyone did the command. The server is port fowarded. Here is the log:

2013-02-20 20:11:46 [iNFO] ZombieSlayer1216 [/98.198.169.190:52434] logged in with entity id 865 at ([world] -456.30000001192093, 42.0, -358.69999998807907)

2013-02-20 20:11:58 [iNFO] GamerzBeHatin [/173.77.147.71:51408] logged in with entity id 1094 at ([world] -762.3210557049267, 64.0, -427.30000001192093)

2013-02-20 20:12:03 [iNFO] [PLAYER_COMMAND] GamerzBeHatin: /tpa Sandwitch1234

2013-02-20 20:12:27 [iNFO] Sandwitch1234 lost connection: disconnect.endOfStream

2013-02-20 20:12:29 [iNFO] GamerzBeHatin lost connection: disconnect.quitting

2013-02-20 20:12:34 [iNFO] Reached end of stream

2013-02-20 20:12:48 [iNFO] GamerzBeHatin [/173.77.147.71:51414] logged in with entity id 1475 at ([world] -757.6999999880791, 66.0, -516.3048773891514)

2013-02-20 20:12:54 [iNFO] /69.22.246.109:50166 lost connection

2013-02-20 20:13:02 [iNFO] /69.22.246.109:50178 lost connection

2013-02-20 20:13:07 [iNFO] GamerzBeHatin lost connection: disconnect.quitting

2013-02-20 20:13:11 [iNFO] Reached end of stream

2013-02-20 20:14:11 [iNFO] Sandwitch1234 [/24.14.5.220:51111] logged in with entity id 2026 at ([world] -913.1067077761262, 11.0, 977.7289862121538)

2013-02-20 20:15:17 [iNFO] [PLAYER_COMMAND] Sandwitch1234: /tpa megaman 24981

2013-02-20 20:15:21 [iNFO] [PLAYER_COMMAND] Megaman24981: /tpaccept 

2013-02-20 20:15:29 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mSandwitch1234[37;1m> thanks[m

2013-02-20 20:15:42 [iNFO] [33;22m[server] [34;22mHave fun!.[m

2013-02-20 20:16:29 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mMegaman24981[37;1m> mine shaft[m

2013-02-20 20:16:42 [iNFO] Stopping server

2013-02-20 20:16:42 [iNFO] [EssentialsSpawn] Disabling EssentialsSpawn vDev2.9.337

2013-02-20 20:16:42 [iNFO] [EssentialsProtect] Disabling EssentialsProtect vDev2.9.337

2013-02-20 20:16:43 [iNFO] [EssentialsChat] Disabling EssentialsChat vDev2.9.337

2013-02-20 20:16:43 [iNFO] [Enjin Minecraft Plugin] Disabling Enjin Minecraft Plugin v2.4.0-bukkit

2013-02-20 20:16:43 [iNFO] [Essentials] Disabling Essentials vDev2.9.337

2013-02-20 20:16:43 [iNFO] [Vault][Economy] Essentials Economy unhooked.

2013-02-20 20:16:43 [iNFO] [AutoAnnouncer] Disabling AutoAnnouncer v1.7-03.23

2013-02-20 20:16:43 [iNFO] [AutoAnnouncer] Scheduling finished!

2013-02-20 20:16:43 [iNFO] [AutoAnnouncer] v1.7-03.23 is disabled!.

2013-02-20 20:16:43 [iNFO] [tekkitrestrict] Disabling tekkitrestrict v1.13

2013-02-20 20:16:43 [iNFO] [tekkitrestrict] [tekkitrestrict] Disabled!

2013-02-20 20:16:43 [iNFO] [CoreProtect] Disabling CoreProtect v1.63

2013-02-20 20:16:43 [iNFO] [WorldGuard] Disabling WorldGuard v5.5.2

2013-02-20 20:16:43 [iNFO] [WorldEdit] Disabling WorldEdit v5.3

2013-02-20 20:16:43 [iNFO] [serverLogSaver] Disabling ServerLogSaver v2.1.1

2013-02-20 20:16:43 [iNFO] [DisguiseCraft] Disabling DisguiseCraft v3.1

2013-02-20 20:16:43 [iNFO] DisguiseCraft disabled!

2013-02-20 20:16:43 [iNFO] [RAM] Disabling RAM v0.1.2

2013-02-20 20:16:43 [iNFO] [RAM v0.1.2] Plugin Shut Down

2013-02-20 20:16:43 [iNFO] [Multiverse-Core] Disabling Multiverse-Core v2.5-b651

2013-02-20 20:16:43 [iNFO] [Vault] Disabling Vault v1.2.16-b184

2013-02-20 20:16:43 [iNFO] [Vault] Disabled Version 1.2.16-b184

2013-02-20 20:16:43 [iNFO] [backup] Disabling Backup v2.0

2013-02-20 20:16:43 [iNFO] [backup] Backup v2.0 has completely un-loaded!

2013-02-20 20:16:43 [iNFO] [GroupManager] Disabling GroupManager v1.9 (2.9.1) (Phoenix)

2013-02-20 20:16:43 [iNFO] GroupManager - INFO - Scheduled Data Saving is disabled!

2013-02-20 20:16:43 [iNFO] GroupManager version 1.9 (2.9.1) (Phoenix) is disabled!

2013-02-20 20:16:44 [iNFO] Saving chunks

2013-02-20 20:16:46 [iNFO] Stopping server

Also sometimes it would start without stoping:

[32;22mCitizen[30;22m)[34;1mpreston189[37;1m> tea[m

2013-02-20 20:00:12 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mpreston189[37;1m> yes[m

2013-02-20 20:00:15 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mMegaman24981[37;1m> meet me at spawn[m

2013-02-20 20:00:16 [iNFO] [PLAYER_COMMAND] preston189: /tpa mg

2013-02-20 20:00:17 [iNFO] [PLAYER_COMMAND] Megaman24981: /home 

2013-02-20 20:00:19 [iNFO] [PLAYER_COMMAND] preston189: /tpa meg

2013-02-20 20:00:21 [iNFO] [PLAYER_COMMAND] Megaman24981: /spawn 

2013-02-20 20:00:23 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mpreston189[37;1m> no[m

2013-02-20 20:00:38 [iNFO] [PLAYER_COMMAND] preston189: /spawn 

2013-02-20 20:00:40 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mMegaman24981[37;1m> why?[m

2013-02-20 20:01:00 [iNFO] [PLAYER_COMMAND] Megaman24981: /home 

2013-02-20 20:01:19 [iNFO] preston189 [/98.203.119.160:35630] logged in with entity id 2867 at ([world] -463.65336779536864, 71.0, -250.14224919200927)

2013-02-20 20:01:26 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mpreston189[37;1m> who els is on[m

2013-02-20 20:01:38 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mpreston189[37;1m> lag[m

2013-02-20 20:01:42 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mMegaman24981[37;1m> well the server[m

2013-02-20 20:01:47 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mPrest00000[37;1m> a lot of lag[m

2013-02-20 20:01:51 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mMegaman24981[37;1m> crashed a lot[m

2013-02-20 20:01:54 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mpreston189[37;1m> magaman team[m

2013-02-20 20:02:11 [iNFO] GamerzBeHatin [/173.77.147.71:51239] logged in with entity id 3260 at ([world] -764.7166489765073, 67.0, -434.4718283381338)

2013-02-20 20:02:12 [iNFO] [PLAYER_COMMAND] preston189: /tpa mag

2013-02-20 20:02:12 [iNFO] GamerzBeHatin lost connection: disconnect.quitting

2013-02-20 20:02:25 [iNFO] [PLAYER_COMMAND] preston189: /tpa meg

2013-02-20 20:02:31 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mpreston189[37;1m> megaman team[m

2013-02-20 20:02:35 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mMegaman24981[37;1m> i can't[m

2013-02-20 20:02:38 [iNFO] [[37;1mworld[37;1m]<[30;22m([32;22mCitizen[30;22m)[34;1mpreston189[37;1m> y[m

2013-02-20 20:03:01 [iNFO] lewdog98 [/99.50.38.94:51444] logged in with entity id 3546 at ([world] 123831.98540922209, 48.13840026789091, 3890.2704422301913)

2013-02-20 20:05:28 [iNFO] Starting minecraft server version 1.2.5

2013-02-20 20:05:28 [iNFO] Attempting early MinecraftForge initialization

2013-02-20 20:05:28 [iNFO] Completed early MinecraftForge initialization

2013-02-20 20:05:28 [iNFO] Forge Mod Loader version 2.2.91.173 for Minecraft 1.2.5 loading

2013-02-20 20:05:28 [FINE] Attempting to load mods contained in the minecraft jar file and associated classes

2013-02-20 20:05:28 [FINE] Minecraft is a file at C:\Users\User\Desktop\Josh's stuff\WHY DID YOU OPEN ME\dont open\jOSH'SSTUFF2\JOSH'S STUFF\tekkit1\Tekkit.jar, loading

2013-02-20 20:05:28 [FINE] Found a mod class net.minecraft.server.mod_MinecraftForge in file Tekkit.jar, attempting to load it

2013-02-20 20:05:28 [FINE] ModLoader BaseMod class net.minecraft.server.mod_MinecraftForge found, loading

2013-02-20 20:05:28 [FINE] ModLoader BaseMod class net.minecraft.server.mod_MinecraftForge loaded

2013-02-20 20:05:28 [FINE] Mod class net.minecraft.server.mod_MinecraftForge loaded successfully

2013-02-20 20:05:28 [FINE] Minecraft jar mods loaded successfully

2013-02-20 20:05:28 [iNFO] Loading mods from C:\Users\User\Desktop\Josh's stuff\WHY DID YOU OPEN ME\dont open\jOSH'SSTUFF2\JOSH'S STUFF\tekkit1\mods

2013-02-20 20:05:28 [FINE] Found a zip or jar file AdditionalPipes-2.1.3-MCPC1.2.5-r3.zip, attempting to load it

2013-02-20 20:05:28 [FINE] Found a mod class net.minecraft.server.mod_AdditionalPipes in file AdditionalPipes-2.1.3-MCPC1.2.5-r3.zip, attempting to load it

2013-02-20 20:05:28 [FINE] ModLoader BaseMod class net.minecraft.server.mod_AdditionalPipes found, loading

2013-02-20 20:05:28 [FINE] ModLoader BaseMod class net.minecraft.server.mod_AdditionalPipes loaded

2013-02-20 20:05:28 [FINE] Failed to find mcmod.info file in AdditionalPipes-2.1.3-MCPC1.2.5-r3.zip for mod_AdditionalPipes

2013-02-20 20:05:28 [FINE] Mod class net.minecraft.server.mod_AdditionalPipes loaded successfully

2013-02-20 20:05:28 [FINE] File AdditionalPipes-2.1.3-MCPC1.2.5-r3.zip loaded successfully

2013-02-20 20:05:28 [FINE] Found a zip or jar file advancedMachines_4.0_bukkit.zip, attempting to load it

2013-02-20 20:05:28 [FINE] Found a mod class net.minecraft.server.mod_IC2AdvancedMachines in file advancedMachines_4.0_bukkit.zip, attempting to load it

2013-02-20 20:05:28 [FINE] ModLoader BaseMod class net.minecraft.server.mod_IC2AdvancedMachines found, loading

2013-02-20 20:05:28 [FINE] ModLoader BaseMod class net.minecraft.server.mod_IC2AdvancedMachines loaded

2013-02-20 20:05:28 [FINE] Failed to find mcmod.info file in advancedMachines_4.0_bukkit.zip for mod_IC2AdvancedMachines

2013-02-20 20:05:28 [FINE] Mod class net.minecraft.server.mod_IC2AdvancedMachines loaded successfully

2013-02-20 20:05:28 [FINE] File advancedMachines_4.0_bukkit.zip loaded successfully

2013-02-20 20:05:28 [FINE] Found a zip or jar file BalkonsWeaponMod1.2.5.jar, attempting to load it

2013-02-20 20:05:28 [FINE] Found a mod class net.minecraft.server.mod_WeaponMod in file 

It really confuses me. Is it a hacker? Is it a bug?