Yep, I guess no dull moments with orchids. You never know what will happen with them! It was in 'normal' bloom when I first bought it, and this is the first time it's bloomed for me. I have two of these Baldan's Kal. and the other plant is in blloom with normal petals yet they are in the same window area. I think it has to do more with culture or watering one more than the other. I don't water them at the same time, as I decide when they need water by my "let's see" watering ritual! This one may not have got as much water. That's the only difference I can think of.
It will be interesting to see if the other buds open this way, which by the sounds of it they will. I'll keep you posted on the next round of blooms.
Thanks to everyone for your help and also for the great Peloric reading links (Dorothy!)
Helen