Gulf Air is very likely to have cancelled 10 out of the original 20 A333 order. The cancellation was under a 'undisclosed customer' going back to 2010. So that leaves us with 10 A333 on order. Minus the rumored 4 that were converted to 6 x A321's. And that laves us with 6 A333's still on order. Now this October Gulf Air updated their order book to + 1 A320 and 3 A321's on the Airbus website.
I'm guessing those last A333's will be converted in due time as well to A320 family.