Thanks everyone. I decided to redo the partitions and haven't had any trouble since then. I like to keep /boot and /home, and /usr separate but in my opinion, It doesn't make a lot of sense to me to separate /, /tmp, and /var on a workstation.

You may have been suffering fro the fact that if a prog has a file open, 'deleting' the file only removes it from dir listing eg via ls.
The file & diskspace remain accounted for until the last prog accessing that file closes it, at which pt the file content is really deleted.

http://linux.die.net/man/2/unlink