Blu, this same thing happened to me and one of our horses....We have a black and white Fox Trotter. His twin though was a Shetland pony!!! They had the EXACT markings. All the way up to the crooked blaze!! It's hard to match paints, but these to horses did!
They looked like Arnold Swirtzinegger (don't know how to spell it) and Danny Devito in the movie Twins.