It may be me and my bad SA but I SWEAR multiple times tonight I saw a "109" on icon (always at a point higher than my alt) then all of a sudden "Where'd that P39 come from??" and looked all around for the mysterious 109 to no avail.
Most of the time this happened was in 1v1 or 2v2 situations, in the large groups I can't say my SA is up to snuff to notice it.
Every P39 in question was also a P39Q, never a D, but then again that my be there are more flying the Q.
the last sortie I witnessed it the icon was a 109 diving on me, I looked away from it to see what's ahead, then looked back and somewhere when it got within D1000 the icon changed to a P39. it was the only enemy in the area.
I may be bugging, but thought I'd bring it up.