yes, over a year ago i had a similar problem with other patches. I found no solution for the "scan" problem. I had to install manually two of the patches, and than the error went away. And i was able to install the remaining patches via virtual center. Since then, other patches/scans worked fine until a few months ago.
The problem is that i'm required to make screenshots of the status of the farm as seen with virtual center update, showing the missing patches, before the patching; and if i can't scan the farm's hosts, i can't. I will have to do that manually on each host, via ssh.
Anyway, i guess your' right, if i'll patch manually host by host, with the "firsts" patches, the problem will probably go away.
I'm cheking the bundle, but if contains something else besides the patches i'm required to install, i can't install it.
Anyway, thanks for the effeort in finding a solution. But i'm still quite curious about why this happens.