I,m still confused. Maybe I missed it. Can you please let us know what the simple fix is, by posting it here, again.

Disconnect the Promariner system or the Galvanic Isolators, Plug the boat in..EZ test. Install latest system thats compatible with GFI dock power.

Thanks everyone,
If you ever have something like this happen, Unplug everything in the boat 1ST!! (It changed the symptoms I was getting).. For my boat, both Shore cord 1 & 2 neutrals were put on the same bus bar in the Main panel on the boat. I removed the 2 neutrals from the buss bar that go to the SC2 sub panel and bonded them together to incoming SC2 neutral with a wire nut in the main panel and BINGO.. Everything's working well. I turned on everything in the boat for the 1st time since I bought it.. The grounds are bonded but not the neutrals...