Is it a known bug, that enemy unit designs (fighters)are not saved in the database?
I engaged several fighter Groups in combat in a PBW game but they are not in the list of known enemy unit designs.
Mines do show up...
Sadly, you're not alone, I have same problems. Units discovered during combats are not stored in database. I think this bug popped up in patch4. But, afair, unit designs scanned with LR Scanners and stolen with intel projects are ok.