Currently, so I am told, there is no integration between Item properties and those in File Store on the same object.
Example: A file in File Store is at Revision 0, you assign it to an Item in the Item Master. In Item Master change the revision (manually or through an ECO or Lifecycle change), and push that revision out to the CAD file (idw or ipt etc). Make changes to the CAD file, save and check back in to Vault. The file in File Store is still at Rev 0, though the ITEM is at Rev 1.
Linked with this, the Vault Revision Table.... pulls it's Revision value from the File Store value... so if it's not in sync with Item Master... it becomes a useless tool.