night last longer, stars/moon skip back every few ticks... mobs walk skippy at night

When night falls, the time tick kind of goes 2 steps forward, one step back. You can see this in a few areas.. the moon and stars literally move a few ticks forward, then a tick back. It makes the night last longer and it makes entities move all skippy. Sleeping is sometimes (not everytime) affected... when I sleep the screen just kind of "ticks" and the sleep cycle never finishes.