I think my placement of some items might have been the issue although I'm not sure. I'm still getting familiar with the Sims 3 and how things work. With the high chair it's possible that I was placing it to close to the wall and it was causing an issue, I moved it farther away and so far it has seemed to be better. I haven't used the MOO cheat so that's not the problem for me. The babies cribs I placed mobile decorations above them. I'm not sure if that caused an issue with the cribs but I removed them and they seemed to be functioning better when I played last.