To avoid this, you need to use only one, not both, of the tank options. And you need to pay close attention to the positioning of your fuel tanks in the AIR file. :-?
I just discovered that I had failed to 'fix' the tank locations in the AIR file for the TRA_Meteor_F3, and had to post an updated AIR file to correct the conflict for those using the F3 weapons upgrade pack I posted earlier.
