Did you edit the thread or edit something from your old bump or post?
No. I made no changes to the OP. Are you saying that bumps are and can be deleted if a thread is bumped without previously adding new information in the OP or any of the following posts that are essential to the OP? If that is the reason, I would understand that. But the rules don't say that a thread can't be bumped unless significant changes have been made to it.