It sounds to me that you have 2 separate problems there. i doubt that they are related.
re: the outputs - Have you tried using the additional outputs, rather than the main outs? try changing the outputs in the 'mix' page.
The second problem sounds like a memory issue to me, how many RAM cards are in there (how much memory have you got in the 1100) ? If you have more than one card, try removing them all and testing one at a time - obviously not Hot Swapping!
I doubt reseating the FX card will help as it seems to be a problem on one preset only - but deffo worth a try too.
Good luck :)
Richard