I see this same thing All. The. Time. with needlework items. Packaged kits that clearly say "crewel embroidery" get listed as "needlepoint." And all kinds of other yarn-and-thread related crafts.
It hasn't helped that twice in my memory the needlework experts (hahahahahahah!!) at eBay have decided that a hand-painted needlepoint canvas, loosely woven of heavily starched cotton threads, is "plastic canvas." Plastic canvas literally is a sheet of plastic with square spaces punched out of it in a regular order. And eBay has changed the categories to "plastic canvas" overnight.
Sometimes it is lack of interest by the sellers, but sometimes it is just plain ignorance -- in my opinion. One seller, apparently tasked with trying to unload Great Aunt Gladys's sewing room, listed two embroidery kits, one in a round floral design, like a wreath, and the other one a bird, like an owl. I ordered the kit to make the wreath, and I received the kit to make an owl. Even if he didn't do embroidery, how difficult was it for him to distinguish a floral wreath from a feathery owl? Sure, I told the seller he sent me the wrong thing, but I had already paid for the wreath. At least he had them listed correctly.
Now I simply shake my head and skip right over those listings. I also sell in those categories. I would not tell a seller his listing was wrong, though.
