Not sure whether the bug is in the Port or SCP, but.....
I was playing the Port under FS2_Open 3.6, warpout bug fix build... this is a Red Alert mission, Gamma 1 and Gamma 2 were destroyed in the previous mission. I was rather surprised to see a support ship come in two seconds into this mission, with orders to rearm Gamma 1. Seven minutes later, when I get a chance, I go to hunt down this "Gamma 1" that shouldn't be here, and see this.

How is this even possible?
EDIT: Yes, it's obvious I was cheating. The only things I gave Invulnerable to were myself, GTSC Rosetta, and Omega 1 and 2. No other fighters got any cheat help.