she tagged me!

A little background first. My hog is about 9 months old. I handle her 5 min a day. Whenever its feeding time, i take her out and hold her for five minutes, place paper towels down in her tank over the walnut shell substrate, place the mouse ontop of the towls, and put the snake back in the tank to eat. I used to feed her every three days, but switched to once a week in fear of overfeeding her.

Today i took the snake out, but when i was holding it, it was pressing its nose against my finger. I had the snake in the left hand, and the mouse (in paper bag ready to drop into the tank) in the right hand. I felt a little pinch on my left finger. The snake didn't break the skin, but i'm pretty sure i was bitten. When i put the snake in the cage, the snake chased the mouse down and sucked it down fast.

question 1: How can i avoid being bitten. It didn't hurt, but when she gets fully grown, i wouldn't want to deal w/her venom.
question 2: I hear people feed snakes in separate containers to avoid a feeding reaction bite when the tank is opened. I also heard that snakes shouldn't be handled after they eat. How can you transport the snake back to its cage after its eaten without disturbing its digestion of the mouse?
question 3: Do you think she smelled the mouse and went for my finger as a mistake? Should i go back to feeding her 2 or 3 times a week? She seemed very hungry, but i don't want to powerfeed her.

Thanks,

David