Sims 3 University Glitches!

I started University with a family I was already playing (3 generations in), I sent one Sim to University, when she got home, no glitches, I sent her back plus one male Sim when they got back from their two terms (honestly I think even when I select 2 terms it only runs as one) the twin girls in my house we no longer selectable but their boxes (not their faces) were still there. The third time before I came home, my girl at University (a toy whom was in love with the male) was killed by a meteor, but when the male got home he was no longer there, neither was the dad, or the two teen twins and all 4 cats! So now my only selectable/playable player is the mom and her life bar says she is a 63 day old elder, but when I left she was maybe 5 days into Adult hood! PLEASE FIX THESE GLITCHES! I can't even play my game right now because most of my people are no longer selectable! :catmad: 😕mileysad: