If you pull the “spam” registrants out then we have nothing to look at.
The clone continues to use the code from the Originally Created Match. If you clone again and again for 12 month then you still are using a match that is really 12 month old. If you must clone we suggest creating a new match, clone it twice (if it’s a monthly clone) then start again. If it’s a yearly match create a new one every time.
We suggest reading this tutorial for more info.