Ringers can be pretty common popups. A lot of times it doesn't really mean anything. Especially when you have a morph like blk pastel or cinnamon with orange dream in the mix. Champagne is another that makes ringers a lot.

But since they are black pastel...maybe? It could help to see the whole pattern on the snakes not just the tail end. Orange Dream does tend to make perfect belly tracks so I wouldn't judge them by that.

The only way to know for sure would be to breed them to a pied or have the shed skin tested for Pied.