You might be right about the SM being a selfing. I think sometimes you do get trade names being used: eg a nursery near to me had a load of (whatever name they used) Octopussy, which were almost certainly Prosthecea cochleatea. Really annoying: they have a suplier produces fabulous plants, then labels them like that, if they have a label at all...
Maybe see how the Milais goes: I think selfings can throw up quite different plants sometimes.