Sorry to hear your of your bad experience. Not only could things have turned out much worse had they found your larger cache (you likely would have been arrested (or heavily fined) as a seller of contraband), but, also, if any of the watches -- real or fake -- had been Rolexes. Many countries treat Rolex infractions more seriously than other brands.
Never a good idea to travel with more than the watch on your wrist unless it is a gen & you are carrying the original sales receipt. Even then, if you are entering/leaving the US & carrying any additional Rolex watches, you can still run into trouble.