When I've made bids/buys from Canada auctions/sellers, the auction amount typically shows in C$ with conversion to US$ for me. I would assume any listing to a non-US ebay.?? would have you listing in that countries currency, i.e. it thinks your are a ?? resident.
I would honestly recommend you do an online support chat with ebay tech support before you do any submissions. They probably can give you best advise on non-resident submissions to foreign servers. I'm wondering if they thought you had International business locations and could ship from US or UK when they gave that advise.
Dan