Are you saying the prongs on the male plug that would connect to a campground pedestal outlet go HOT when you start the genset and the transfer switch kicks in??? If so, then YES, transfer is wired wrong and that would mean
1. a VERY dangerous condition, and
2. no power transferred from generator output to you coach's 120VAC circuits
With a transfer switch wiring diagram, a meter, a helper and a cool head, you could correct the wiring BUT BUT BUT If the condition's as I understand it above, you are approaching very serious safety issues. Please don't attempt to correct this without gold plated double locking sure fire certainty that you can get it 1,000-percent right.
