Your story is a little hard to follow.
Regardless, I'll comment on how I interpret what you've explained.
They sound like they're not accustomed to their new home and should be left alone to calm down and settle in.
You should be feeding them in some sort of containment, not out in the open. If they're flying off your bed like you say, you don't have them in a proper feeding situation. You also sound like you have all the snakes out at once and are trying to feed them together. Keep them isolated and do one at a time to make it easier. Lastly, it sounds like you weren't using forceps to handle your rats. If you were, I'm not really sure how you managed to get your hand by it's face.
Ball pythons are very GENERALLY docile and won't bite. However, anything will bite if it's stressed enough.
My advice is to give the snakes more time to settle in and also be more careful with your feeding attempts. If your hands smell like rodent, or if you dangle your hand in front of the snake when the room smells like prey, I'm hard pressed to blame the snake.