[Mobhack]

The game (and the allocation of flights) is based on the premise that air strike points are sections of 2 (sometimes 3 e.g. japanese WW2) strike planes of the same type. Bombers may be in flights of 4 planes.

By all means if rolling your own OOB, mix planes and make 10 plane squadrons if it floats your boat. But then your opponent may well howl, if he had 2 flights (and so 4 planes) and you got 2 as well - but bought 20 aircraft in 2 10 plane squadrons..

Cheers
Andy