I just want the exact step by step process on how you are unapproving a post, starting at the thread list before you even enter the topic... Without being able to replicate your issue there is nothing we can do to *fix* your issue.
Just simply saying
I do what I do and that's how I do it....
doesn't help us in recreating your issue; again, please provide a full bug report with every step involved in how you're able to create this issue, so that we can replicate it to propose a fix...
Full Steps Required:
1. I click on the subject title to open the tread
2.
3.
4.
5. The entire thread is now unapproved!