Hello, I've returned to photography after a time away and moved up from 35 mm film to medium. I bought a Yashica 124 g mat recently and have put three films through. All fine. So far. However, last time out, after shooting 12 photos I rewound the film correctly. Unfortunately, instead of rewinding clean, the mechanism continues past 12 and onto 1, 2...etc I stopped here. I originally set the film internally correctly for 12 shots. I've seen similar problems in the forum but not the same. Has anyone any suggestions? Or suffered a similar problem? Greatly appreciate any suggestions.