UM doesn't seem to be working

All my ESX hosts are showing as compliant but only 1 patch is listed as installed (ESXi510-20121040-BG).

All other patches listed are displaying ‘Not Applicable’. This includes any ESXi510 updates which were released after the above patch – so I would have expected these to show up as needing to be installed, but they don’t.

My baselines are configured correctly – one that picks up all critical patches and another picks up all non-critical patches.

I know I can install these at the CLI (and grab them all with the patch release ESXi510-201212001) but wouldn’t mind finding out if there is something wrong with UM if anyone has any suggestions?

Thanks

Steve