Nautilus P1 has leaking connections

I'm totally stumped by my inability to stop the swivel connectors to stop leaking on my Nautilus P1 system !!   I first noticed a slight drip when the valves were in position to power fill the fresh water tank.   I thought the rubber cone washer was just bad so I replaced it.   The leak got worse.   Then I purchased a new swivel connector which includes the cone washer and installed it properly with pex cinch clamps and tool.  Leak is still there.    I played around with not tightening it much (1/4 turn past snug)   then tightened it more.......leak got worse the tighter I made it.   The Manifold on the back of the panel looks good.   I removed it and gave it a thorough examination and saw no cracks and the threads look good.

I'm totally stumped by this.   I normally have good success with fixing about anything but  for some reason this Nautilus P1 panel has become a royal pain in the rear.    Would appreciate suggestions or ideas.