Take those flags with a grain of salt. One FW-190 goes through a B-17 formation and someone takes a piece off his tail and presto.....24 kills!!!
T/Sgt Art Benko top turret gunner of the B-24D "The Goon" 308th BG CBI had 16 real kills before being KIA (the Japanese crucified him!!!) with 7 in 1 mission.
There was a 323rd BG B-26 gunner who downed 2 ME-262s on 1 mission after being wounded winning the Silver Star 3-45.
Sgt John Quinlan of the Memphis Belle has 5 I believe from both his tours. The top Navy gunner had 4 I think John Liska in SBDs at Coral Sea and later SB2Cs.
http://www.308thbombgroup.org/goon.htm