Check for an entry in the MSIFileHash table for these files the result is that the file is unversioned. Windows Installer uses this information to determine if an update is needed for these files.
This could also be caused by sequencing
You may be able to force Windows Installer to update these files by turning off the option to add them to this table and removing any entries for them in the MsiFileHash table. To do this, Open the new/updated MSI that was created for the patch. Located the files on the Files page and remove the check mark to Add to Hash Table for the file details dialog. Also check to see if any of these files have entries in the MSIFileHash table. If they do, delete that row from the table. Compile and run the Patch Creation tool to create a new patch.
When creating patch select the option to use new PCP file.
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