Okay, I have 4 male turtles in my tank, 3 babies which are probably around 3-9 months old and I have 1 1-2 year old. Note: This is only temporary, on Sunday the babies and the old one will be separated and they will each have their own separate tanks.
The problem is that one of the babies is constantly bothering both the other babies and the older turtle. He frequently does the slapping himself in the head dance (he vibrates his front claws against his head) to the others. What is pretty pathetic is that the baby is actually scaring the older turtle who is at least 3 or 4 times his size. The struggles usually last 2 or 3 minutes in which they will fight all through the tank. The little baby usually pushes the older turtle around the tank. Both turtles do it in unison, but the little turtle is always the one who pushes the others against the sides and such.
I know he is not of mating age, but does this mean he is a terrible little aggressor or is he just one confused little turtle. I tried researching this behavior on the internet, but I have not come to any suitable conclusions.

