This is getting pretty annoying. Just got the MX Duo a couple of weeks ago, and the MX700 is deciding to go back a page on me every once in awhile. At first I thought I was hitting one of the side buttons, so I paid close attention and that's not it. It's not getting any interference, becasue it only does it when I'm using it., not when it is just sitting there. Is this happening to anyone else.... and is there a fix?