cacher dawnandgary should qualify for this AlphaNumeric Cacher Name Challenge, GC3R8C3, but the checker says they are lacking a "7" (cache owner name starting with a "7"). But they found https://coord.info/GC1XR30 on 12/26/2010 and the owner is 7Hammer. Something is not right. Maybe the checker is looking at "Placed by" instead of "Owner" ???? This one was placed under another name.
Here is a new checker that tests for owner name instead of "placed by" like the old one did, but please note that this would make it easier for people to lose their qualification of the challenge, every time a cache is adopted this will lead to a new result in this checker.
As I understand it this would require a totally new script, this would mean that somebody would have to spend time on making everything "from scratch" instead of just adding a new tag like I did. Since this is a grandfathered challenge it is unlikely that somebody would want to spend that much time on it.
I agree with vogelbird's suggestion tho, this challenge is old enough that there should be no problem having both checkers on the cache page and explaining the difference of them. Players could choose to use checker A or checker B or manually combine the information from both of them to get their qualifications if you as a CO allow it.
You would probably want to update this part of the cache page too since this wouldn't really be true anymore: "In addition, only original cache owner names count. Names of cachers that placed the cache or adopted the cache will not count, only the names of the original cache owners."