Hi Terryede,
There are numbers of factor which can cause such synchronizing issues with Microsoft Outlook and other devices while dealing with an IMAP account.
1.) Root Folder path for IMAP account
2.) Subscribe the Root folder
3.) Wrong settings of Outlook profile
For more, you can take the help of given link:
http://www.msoutlook.info/question/840
Along with this, go and also disable the
“Perform an automatic send/receive when exiting” dialog box from the define send/receive group settings.
Thanks
Clark Kent