I take it items are disappearing from the device, but are still in Outlook, right? If that's the case, go to Options / Status, and see how much memory is left.
Also, check in Outlook if you have Notes set to archive. If yes, the items would move from Outlook's default .pst file to an archive.pst file, then when you sync with your BlackBerry, it would then be removed from there, too!
The notes are not going to outlook. Which is something else I would like to do. I have 35963136 bytes free. I know I didnt delete the file. It has happened before and I dont know why Im just to new to this