User Manual AmazonBasics AB-DH502-SN Electronic Deadbolt Door Lock

Yes, you can switch the side where the bolt comes out of,but you have to change a switch on the control board.

I'm sure it's possible. But it may not be water proof.

This happens to me too once in a while. Not sure why it happens, but my guess is it has something to do with the auto lock feature. If you lock the deadbolt manually then unlock it using the keypad, for me this stops it from beeping.