Thank you all very much! That is the same plant in both of the pics in the original post. The first is the most recent pic. It was perfect and green until I put it in the sun a few times. I wonder if sun damage / stress can induce the virus/bacteria/fungus then causing the blotching.
Here are more current pics which include a pot of Aphrodite that, to me, have different leave shape (they don't have a deep ridge or a very vertical fan structure. The Aphrodite have had much more direct light and no signs of "burn", so this and the different foliage made me wonder if I was dealing with some sort of hybrid or unusual amaryllis.
I will try cinnamon on the soil. I've read about red blotch etc and will keep an eye on it. I expect that if that is the cause of the red, then the leaves will die. is that a reasonable expectation ? I've read about hot water baths for the bulb followed by drying with captan application to address red blotch infections in amaryllis.
