That's a bummer... I've had mine for 9 days now and I've done a bunch of edits, was able to save my presets (on a Mac Book Pro), updated the firmware twice and knock on wood, I haven't had any trouble at all. I thought I had an issue, where I was editing one effect and all of the sudden another effect would open up and I was changing a parameter on that effect instead of the original one I had opened. It turns out I was touching one of the footswitches on the bottom row with my arm while I was reaching up to the knobs. Those switches are super sensitive...
Hope you get it sorted out... I'd be pretty frustrated too