It was a Windows phone running the 6.5 version I believe - the last version before they released Windows 7. I believe that my girls "checked off" my tasks which then made them appeared as completed in Outlook 2007 (ON MY COMPUTER). Even though I've now removed the "check" so that the task is now shown as "not completed," it still shows up with a strikethrough the title in my Outlook 2007 (ON MY COMPUTER) list and won't show up in my active or incomplete task lists....