Try updating your graphics card drivers.
Unfortunately they are up to date.
As for your summoned sims: I have never done this so I am not sure if this will work but once you summon them try using the insiminator to add them to the family or make them selective and have them move out of the university into the neighborhood. Again, I have no idea if this would work. Good luck!
I did make them selective and have them "find own place" but it didn't work because they didn't live there.
I will give adding them to the family a try, if I can figure out how!