Can somebody explain to me why this occurs? Sometimes, when I do an in-depth registry clean, it will show I have registry issues but they won't be shown in the expanded view when I view the details. Please refer to the following screen shot compilation to see what I am talking about.

This has happened in the past and seems that if I do an uninstall and reinstall the hidden issues/false positives disappear.
I am running XP Pro (still), SP3, with AVAST running at the same time. CCleaner does not find the issues.