LastDodo site & app/Item remains in counter despite being deleted4 messages

I just saw that I accidentally added a comic (from the XIII Mystery series) in hardcover to my collection. I erased it and replaced it with the softcover edition. The hardcover item has now correctly disappeared from my collection but the item counter for "comics" continues to count the hardcover incorrectly as well. (both on the site and on the app). So I have one item too many on the counter.

The heading for the album series XIII Mystery-HC is also still in the structure of "my collection", although there are no items left in it.

"My Collection" also indicates still the sections 'Postcards', 'Books' and 'Posters' again, which I cleared earlier. This can also be changed.
(The app does not have this problem, the site does.)

Deleted items do not disappear from the counters until the night after.

Mercury and Flupke counter stays at 7 while the series is empty.

Edit: Still not empty, " related sections ". I only see that button now. Is there a sleeve to adjust there? I don't know how to change the reference to other headings. So the curio link.