Transfer switch question???

I finally got around to installing an inverter and have question concerning transfer switch. A little information on what I have. I bought a 50A progressive dynamics xfer switch that I wired with priority to shore power instead of inverter/generator. I took the time delay out so the switch will transfer power instantly with no loads dropping out. I ran the power for the AC's and hot water heater through a contactor that is actuated by shore power so when power is switched to inverter, both ACs and water heater are open circuits. I also ran a separate 30A marine plug to the front of the camper to power camper from portable generator and tied it into the inverter circuit via a 30A transfer switch with priority to inverter and a time delay switch to generator.

Everything works well configured this way but I do have concerns with the 50A relay switching loads backwards. Progressive dynamics have been little help as to drawbacks if any and I was seeking wisdom from fellow campers. Any information would be appreciated.