you've cleary put some effort into making this post, so I'm gonna give you a whole day to edit your OP with the bug report template so we have some more info to go on. I really hope that you do, too because I'd actually like to help you without being hypocritical.
we have rules for a reason. that reason is not so they can be ignored/bent by people who "love tekkit". it's also not because we want them to be broken.
well, I'm not going to lock your thread or anything, but I have no idea if anyone else here has any experience with that particular host. so don't get your hopes up too high. if someone knows how to do it though, hey that's great.
the whole jar folder thing should not exist. if you're still putting most of the stuff in there, that could explain a lot. generally when that happens it means the server doesn't have the mod installed but the client does.
what's happening is that it's trying to use their config instead of tekkit's config. this is a problem because their setup is obviously not tekkit and so you get lots of conflicts.
block IDs for one thing. it looks like you took a server that was already setup, and just replaced the server jar with the tekkit one. the whole thing probably needs to be wiped and started again from scratch
whoops, you're right, the latest is 2.1.0. my bad
there is no 2.1.1 tekkit version.
edit again: 2.1.1 IS the verion you get, it's mislabeled in the launcher. knew I thought that for a reason.
wow, I seem to recall seeing a user named callum posting here in the past. he sounds like he's 12 and is fellating his mic the whole time. first vid got taken down due to terms of use violations though