This has now been resolved. Please remove the thread.
I was the one decline one of these flags. It is important to know that when you flag comments, a moderator cannot see who flagged it. I understood this as "The question has now been solved. Please delete it." which is an automatic decline. As the answer at the time had 0 votes, the OP could delete the whole question if he or she so wanted to.
Also, do not use a custom flag when there are existing flag reasons that matches what you want. Quite recently, a new decline reason was added for this specific reason - to use existing flag reasons instead of custom ones.:
Using standard flags helps us prioritize problems and resolve them faster. Please familiarize yourself with the list of standard flags: see What is Flagging?