I may not have 12 snakes but I do have a coastal carpet, and have seen many different types of carpet pythons. 1) coastals are not orange. Even the "red phase" coastals do not show anything close to that type of coloring. Orange is however, very common to varying degrees on the IJ color pallet. 2) the pattern is classic irian jaya. Thin white areas bordered by black on a brown or orange background. And they typically are not as heavily patterned as a coastal. 3) the biggest giveaway is what I call the mustache. Irian jayas very often have little black markings on their upper lip area which looks kind of like a mustache. This trait is not at all common in other subspecies though some may have something similar. If your coastal looks identical to this irian jaya, I would assume you we're mislead by whoever sold it to you. The two are not difficult to tell apart if you are familiar with both. Would you mind posting a picture of your carpet python?