Hosts/Library systems don't show as requiring any updates/no new updates in compliance properties despite being assigned

Question

We have VMM 2012 R2.  In Sept/Oct of 2014 we were able to update all resources in VMM (Library Servers and Hyper-V hosts) by creating an update baseline and then adding updates to it.  However, since then, when i create a new Update Baseline, add
updates to it and assign it to servers, when i scan against it, they don't show as requiring any new updates and are compliant with all existing updates.  
I've verified the updates are in my new update baseline.  When i click on a library server (the update server for example), and right click and select Compliance Properties, i can see all the baselines assigned to that system.  It shows all the
updates in each baseline, and in the existing baselines from Sept/Oct, there are updates in that baseline.  It also shows my baselines from November and December, but it doesn't show any updates in those. 
Whether I create a new baseline or add updates to an existing baseline (whether that's an Nov/Dec or Sept/Oct baseline), no updates show up under Compliance Properties of an assigned server.  They do show up in the actual Update Baseline under Library
| Update Catalog and Baselines | Update Baselines.
Any thoughts?  I'm stumped

Answer 1

Thanks for the suggestion.  I did just check one client and it did have an older version of the VMM Client.  I went ahead and updated it and then scanned it again and it is still showing as compliant, but there are no new updates showing in the
'Compliance Properties'.  I then rebooted that client, thinking maybe a reboot was necessary after upgrading the VMM client, but no change.  Here's a screenshot of the compliance properties for that client post-upgrade:
Notice how in the '2014 Monthly Updates -012 December' update baseline there are no updates listed, but there are in other Update Baselines?  When I add updates to any baseline, new or existing, they don't show up in this Compliance Properties view.