Just got my Note last week and So Far I Love it. However, when I edit a spreadsheet File From Excel in any Of the popular mobile office programs (I've tried Polaris,Quick office,Docs to go,Office Suite Kings oft) I am unable to open them back up in Excel. Excel tells me the File is corrupt. I have tried opening the Files on Several laptops & desktops using a couple of versions of MS office. Am I missing a setting on my note? Or in one of the mobile aps?