No problem guys.
Breeding two of the pied offspring would be fine. It's been done by breeders for years. I can't say with any authority that you'd NEVER run into any problems line breeding but in the scenario we've been talking about, you'd be fine and so would the snakes!
Clarke, with simple recessive genes (Albino, Piebald, Ghost, Genetic Stripe and etc), both parents need to carry the gene for any of the offspring to come out pied. It's a different story all together with co-dominant genes though...
With Co-dominant genes, you get to see results with the first clutch. If you breed a Mojave or a Pastel Jungle to a normal, 50% of the babies will be Mojave or Pastel. Pretty cool.
If you really want to get into some crazy snake genetics, start reading about corn snake genes...