Possible bug with university classes?

My sim has been doing homework and taking notes in every single class she has been in, plus the presentations and term papers, but the result remains the same - after every class, she gets threatened with bad grade as if she had done absolutely nothing, which I know isn't true. I have never came across something like that with the 10+ sims I have put through university before, they have all graduated with honors, so I know how it's done. At this point, I may as well cheat her the degree and move on, because she aint gonna get it the regular way. I have done some research and apparently it's yet another bug that was never fixed.