I grew it temperate to warm along with the other phrags for several months, then I moved them all to the greenhouse for a cooling off and more light. My guess is that's what caused the uneven petals of the first flower.
I don't have a Don Wimber. I bought several seedlings over the years. When they bloomed, none of them were particularly good, not near as nice as this one. Had they been, I certainly would have kept them.