Same here! Received a Pink Lemonade from Seattle Orchids a week or two ago. First thing I did was cut off all affected leaves, including a whole psudobulb. Hoping it doesn't continue to spread and will bloom for me soon!
It seems that the pink lemonade is very susceptible to this disease! I ended up removing most of the infected leaves and I rubbed cinnamon on the remaining black spots, seems to be doing the trick. She has started to develop two flower spikes so I am impatiently waiting for blooms!