EXACTLY!!
In my very humble opinion, it's a complete GIMMICK to say its a co-dominants sibling.
It's a normal, it does not carry or even remotely carry the "patterns" of the co-dominant mutation. That is just a plain ol' fact in regards to the inheritance of co-dominant genes.
Now then, the parents could be a gorgeous reduced or high blushing animal, and those are separate traits unto themselves that have absolutely NOTHING to do with the co-dominant mutation like a spider or mojave. Those traits can be passed on most definitely.
But to sit there and tell me that a Pastel or Mojave SIBLING carries "traits" of the mojave is NOT because of the mojave or pastel gene itself! That is not how simple co-dominant inheritance works!
You don't get to keep a piece of the pastel gene like it rubbed off on the siblings, you either get it all or nothing.
There is such a variance in normals, that there are most likely MANY genes that affect how they come out. With circles inside of their dorsal spots, or really faded blushing between the alien heads, or extra white or yellow bellies. These are not vindictive of a co-dominant morph that we know and breed for today, but are likely separate traits unto themselves that should not be gimmicked into being called "morph traits". It's simply misleading and unknowing buyers think they are getting something extra special, when in reality it is just a normal, no matter how beautiful or unique it is.