You flag was set to disputed due to this Triage review where three user choose "Looks OK" and two "Requires Editing".
As explained in What is a disputed flag?:
A recommend closure flag kicked the post into the Triage review queue, and the result of the review was "Looks OK" or "Needs Editing".
Nevertheless, your flag was imho correct and I added a close-vote to the question.
As @Davy M. already said in a comment, flagging a question as duplicate is not unwelcoming. It helps the question author to get their answer faster.