Software Updates Repeat

Ever since I upgraded to Mountain Lion and its new Software Update process I have exprienced some programs that Software Update wants to update again and again. Currently, the three that the software wants to install multiple times are: Angry Birds, 3.0; Growl 2.0.1; and Pimp your Screen 1.6. Previously software installed BusyCal 2.0.2 three times. This problem occurs on my iMac and MacBook Pro. They both run Mountain Lion.

I don't know if Apple is having problems with third party apps in its store or there is something on my Macs that is not right, like a plist, that is causing Software Update not to recognize that it previously installed the programs.

Has anyone else experience this issue? If so, what was the fix? I called Apple once about it but the problem seems to go away for awhile. It is back now.

Thanks in advance for your advice.

Jay