I have not logged onto Halo Waypoint since about 2007 and Used it a lot with Halo 3’s in-game menu to save custom maps and screenshots. When I logged in today November 2021, My user name was different. I first noticed this on Halo Inf. Multiplayer Beta menu when looking at custom/user files. It had two of my maps from Halo 3, But listed as created by SupaSoldier###. Saw that it is a known issue and viewed the specific forum “someone is using my acconut to posting things”. if it is a mixup and not a security issue, I can wait until it is fixed. I logged out all devices from the Security Tap. Had logins from all over the world!