Is there a plan to integrate some kind of an extra field in the window "Add to my collection" and "Edit items in my collection", where user can tick "YES/NO" or "TRUE/FALSE" on whether a coin entered is a coin with error? This would be for personal use only and not published for all to see, and so does not affect the number of different "official issues" within a coin page.
If this is implemented, there is a logical follow-up with displaying the list of coins with errors within the collection on "My coins" page. A personal picture could be in this case used (if available) instead of the one from public profile.
Some of us users here also try to lay hands on such official mistakes...
LP