While I NORMALLY agree that you shouldn't interbreed... That's not how genetics work, Chad.
Double red, Triple Red, and Orange Flash, are all cacatuoides. IE, a pair of one kind WILL throw babies of others.
Also, there's a theory, that in the wild Kingfishers scoop up apistos to feed their babies, and consequently, travel up to 20 miles. Apistos are smart enough to play dead, and kingfisher young will throw back dead fish. And these fish really don't care WHERE they're dropped. As long as the find another fish to mate with.
The only "purity" to them is that you believe they started out as a pure strain, or want to keep what you have "pure".
Ever seen a shop with a lone "Unknown" Apisto they got from their shipper? This is why.
Very interesting!