User blog comment:Oleg 1 o/category/@comment-32671756-20170813111815

To remove an incorrect category for an item, you can edit the page, see upper-right, click on a sign like this: "≡", you can add and delete category there for the item.

If you want to remove a whole category, you can add {.{delete}} (remove "." to make it work) on that category page, the admin will delete that later.