Leslie, this flower is great, its colouration is phantastic and without its indentation on z´the petals it would be perfect.
What I'm wondering about is the green colouration of the leaves without any reddish pigmentation. I'm just about to grow one P. callosum 'vinicolor' to flowering size, but its leaves have a complete different look to them of your plant. In the end her flower will tell me if it is a P. callosum vinicolor.
Who am I to argue with the above: splendid colouring!
If the indentations weren't there the first time around, their presence probably is due to either chance or a cultural issue, when the bud was formed. So patience, my friend, and enjoy the flowering despite the small 'flaw', assured that "good things come to those, who wait"!