If you change your username why does it show me as a different person now. it still lists my old username as the comments i made before i changed my new username. will this separate my comments from my comments now and possibly at the end of the year DJI will falsly count the number of my comments?

Hi there, we have been aware of the old username synchronization issue and will keep getting it optimized.
Don't worry, it will not separate your comments after you change the username, we count the number of the comments via your Forum account.