I thought I was going crazy since I've been using the new duo. When I work with Excel in the lower screen it does all kind of things with the data. It has changed numbers - ahhh! And deleted notes Double AHH! In reconciling some statements, I tried to correct the problems but everytime I entered a number, excel would place the number in the cell beneath. It's nuts - it has really effected A LOT of my data. AND it's getting worse. I know it's the lower screen because it seems to be doing ok in the upper screen. Problem is, if I move the spread sheet to the lower screen, it serious AND PERMANTLY changes the data. Not what I expect for the price.