I'm no scientiest, nor expert on Paphs, but I have had deformed flowers on other orchids before. Usually just one on a spike, but sometimes more than one. Phals, Onc, and Epi's. I always chalked it up to mother nature and her sense of playfullness. Or, more realistically, just a little DNA mixup at the time the bud was forming. Haven't had the problem on a paph or phrag yet, but I'll be keeping an interested eye on the answers you get.