Sims get into bed, then instantly get out again and cancel the sleep action.

I've gotten this for quite a while in the game, as well. I'm not sure if this is a byproduct of intended behavior or not, but I agree it does get old fast -___-

My sims did that one time, send him to bed and then he would get back up. The problem was I forgot I had left a radio on in the room he was sleeping in. When I turn it off then he was able to get some sleep.