I have posted on this subject in the past. I will bet that you are clicking on the the top row of buttons that selects between all, fighters, bombers, attackers, vehicles. In all but the attack list of planes, the default scoring is for the type of machine you are in. If you choose fighter from the list, it will score as a fighter. A bomber list plane, as a bomber. But if you click the attack list, the default score is for fighter !
You have to remember after you choose an attacker to go to the lower right and click on score as attack, not fighter.
I've complained about the ill- logic of this in the past, but HTC never responds or fixes it.