FIX report:
So after waiting for almost a week, and no response, I decided to try to fiddle w/ it my self after reading this.(do not post bugs here as it says in the first post)
Although this doesn't seem to be my error specifically it seems to be close to one or two of them.
1) So I started by backing up everything including mods from other packs. (knowing before hand that the error was exclusive to b team i didn't want to break more things.)
2) Next i uninstalled b team and reinstalled it.
3) opened mojang... (successful)
4) made test world and opened it. (everything checks out fine)
5) copied saved world from the buggy back up i made in step 1 and placed into new b team save folder.
6) repeated steps 2-4 successfully.
7) loaded transplanted world file and voilĂ , it was fixed!
I intended to do more if this still didn't work, but there was no need.