Thanks a lot very helpful

I have recently played Axis & Allies for the first time but there are a couple of the rules I am not sure we are playing correctly.

1. Strategic Bombing.
   The anti aircraft gun is getting a shot in when the bomber first enters the territory during the combat move. The antiaircraft gun then has a second shot during the combat phase. Is this correct or should it only have one shot?

2. Transport
   The diagram in the rules on page 30 shows an infantryman in every combination that a transport can carry. Does this prevent a combination without an infantryman. for example can a transport carry two tanks or two artillery?