Okay. Three years passed, and I still have the problem with album dublicates. On this page you can see a lot of dublicate pages: https://www.last.fm/ru/music/5%27nizza/+albums. Blue marker is wrong tag name, while red is right. Please, fix it.
I suspect this is a glitch caused by, ironically, trying to clean up the music catalogue by having incorrect variations (see the "Keep Stats Clean" artwork) auto-redirect to the correct page, but for some reason the variations are still being listed as separate entries but with the same name on the albums page.