filter applied in outlook is preventing files from syncing to exchange server

I am migrating inbox file from a IMAP server to Exchange Server.   Initially I connect my outlook to the IMAP server to download all the user's files and then I export it to a PST file.    Then I connect the Exchange account to Outlook and import the pst file to Exchange.  

I discovered a problem.  When the pst file is imported to exchange, it says "Filter Applied" in the lower left corner of my outlook.  As a result, I don't see all the files loading to Exchange when I view them in OWA.   Why is this happening?  Does it mean that I am not importing all the files?  I don't see the files unless I go through each folder and remove the filter.  How can I stop this?