Bull Snake Question

I have one pair of hypo bulls and they have been in brumation since November. My corns, kings, and milks are all acting like snakes in brumation no movement, no noise no nothing. Temps average in the room between 55 and 60 degrees. My bulls on the other hand are active, noisy and acting like nothing is any different than any other time. I walk in to check water and they are right there at the front of their tubs in full display for all to see. If they are supposed to be sleeping this behavior seems abnormal. However not being familiar with the species habits I am not sure. So do I need to do something different?

my bull/gopher snake does the same thing but she wont eat in burmation months. she is slower than normal and not as active but from the info I got this is normal.

This is normal for all snakes. Even though they are brumating, they aren't sleeping just slowed down alot. But they do sleep while brumating but not the whole time.