Missile Defence bugged?

Originally Posted by Goblin Wizard

IMO the whole "team" feature is a little bugged. All teammates except leader shot much less often than when they fly alone.

This right there is a huge annoyance I have with the game. My pilots tend to solo all the time even though some team bonuses are pretty large (+20% in one particular skill iirc).

I don't remember seeing that error all the times I had Alex on the team. As Goblin Wizard said, try restoring your original localization files and do whatever changes you did again more carefully.