It doesn't make sense except for one main thing eBay seems to act on,(someone has reported your listing),X-(

Which generally means they are selling the same or similar items themselves.

The other sellers are using the same listing style as this search for ford xa xb xc shows:

http://www.ebay.com.au/sch/i.html?_trksid=p3984.m570.l1311.R1&_nkw=ford+xa+xb+xc&_sacat=0&_from=R40

It shouldn't matter which manufacturer they are from as long as they are listed in the correct category:  Vehicle Parts & Accessories >Car, Truck Parts >Wheels, Tyres > Wheels

Maybe ask eBay how they want all the other 1500 plus listings reported that violate the same criteria under which you listed,?:|

At the same time maybe try explaining to them that's the way Aussies search for those particular type of wheels.

Good luck with it.