Most likely they didn't resolve themselves, or it may have been issues with duplicate subscriptions that the script fixed as it went.
I'm betting it's just very obscure criteria that are causing them.
Thank you for sending me the info, I'll fine tooth comb things and see if I can locate a spot where the issues are occuring.
Seriously.. thank you all so much for the bug reports. None of these issues are appearing on my site, so without the bug reports.. I'd never know about them. if anyone is experiencing similar issues, please let me know. It can help sometimes to compare sites that are having the problem to be able to see similiarities that will help me narrow down the issue.
Particularly if it involves conflicts with other modifications.