2 questions
 

to unlock a plane, when it says 'win 20 dogfight or team battle' , does that mean you have to win 20 of either type, or does the # of wins in each type get added up to 20 ( for example, 7 dogfight and 13 battles )

also for the b-17, when it say "win 50 strikes in any bomber", do all those have to be in the SAME bomber, or is it total wins in all bombers added up?

A total of 20 games. 1 dogfight + 19 team dogfight, or 20 teamdogfight, 10 dogfight + 10 team dogfight. You get it ;).

And for the B-17, any bomber is ok, and not always the same one is needed :)

Win 20 dogfights or team battle = # of dogfight wins and # of team dogfights wins must equal 20

for B-17 any bomber is the answer, I recommend checking the plane unlocks because there is a way of unlocking 3 planes as you try unlocking the B-17 (planes are ju87d-3( i think), fw 190 f-8, and B17)

I'm sure it's any bomber for the B17, however, I'm not sure about the other unlock type.

LOL...you got 3 answers in 1 minute there :P