I am desperately seeking explanations for why excel worksheets behave badly in Sharepoint. Sharepoint application is 2007 and we use Office 2010. When we started having trouble I backward saved the problem spreadsheets to 2003-2007 in case there as a conpatability problem and no better. They are basic petty cash records which use simple formaulas. We have about 12 users.Different users have reported saving data and checking at as saved and then on reopening spreadhseets a seond time it disappears! I have been blaming certain users for many months thinking they are not saving properly but now many people face the same problem. We have disappearing data! Please has anyone eoncountered problems of this kind? thank you . Janet (new. first post)