Oh how beautiful! The stripes are so symmetrical that I guess I'd have wondered whether it was genetics or illness, too. I'm so glad it blooms true ... do you know who the parent's of it were? And, have you tried both setting pod and using pollen, and on a variety of both dips and tets? I have found several in my garden that, though they are recorded as a dip or tet, are only setting pods or fertilizing the opposite ploidy, and one so far that sets and pollinates both ways.
Sure would be great to get some seedlings!
And, *puts camera in your hand for the feathery photo shoot*