Ebay must be INTENTIONALLY not allowing to report "Incorrect item description". There's just no such selection under their numerous drop down menus. This is why I avoid using ebay as much as possible.
For the item that is misrepresented with a wrong catalogue number, while the seller states in large capital letters that they only sell guaranteed genuine items, there is no matching selection. The best I could do was:

REPORT CATEGORY: Listing practices
REASON FOR REPORT: Inappropriate item description (FAIL! because at the third menu there's no match!)
REASON FOR REPORT:  Other listing practices (you would guess this one will be fine!)
DETAILED REASON: No match at all, not even close!

Thus unable to report the seller who misrepresents their item.

For such a large company ebay either are incompetent idiots or crooks. In the above case it is a banknote listing that gives a completely wrong catalogue number, but in other cases it was plants, such as palm trees tat were intentionally misrepresented, selling cheap palms as rare ones. Ebay does not have a good match to report it and there is no comments field to explain what is wrong with the listing. I believe that ebay does this intentionally.