Please don't take my response as the official answer. I am just hanging here like you are and trying to offer some help to a fellow guitar enthusiast.

I was making a suggestion for you to look at some settings and possibly try something with the hopes that it would solve your problem.

I know when I set up my UX1 interface I had some funky things going on with the sounds and ended up making the UX1 my 'sound card'

Good luck. I hope you will circle back and let us know how things go.