Erich!
Wow!! Sure appears to be off somehow! First, did you take the pictures with an iPhone? That's probably the cause of the rotated pictures when you click on each one. Some websites are able to readjust pictures when uploaded, but VDF tends to looks at the embedded data of the picture and post them the way the camera takes them. You need to hold your phone horizontally and the pictures will display properly on VDF. Just some FYI!! I went ahead and adjusted your pictures to make them easier to see for everyone.
While a lot of work, if the drum were mine, I'd be doing a complete disassembly so I could check on all the holes with a soft tape measure, not a metal ruler. There certainly appears to be odd hole punching going on, so I'd like to see for myself what's going on. While it can't fix the problem, at least you'd know what happened! Also, I have seen issues with hoops, where there was some kind of error in production. Certainly not as common as hole punching errors, but it's possible!
-Mark