Well, you see that is something I have noticed... my toons will sleep ALOT.
I praised them when I started noticing them being tired, and now when they're tired they'll go to sleep without me telling them to.

The problem is they will sleep for 10-20 minutes easily... get out of bed... and 2 minutes later, go back to bed because they're tired again.

That is the main worrying thing... I don't know, maybe they are getting too much sleep?