You did the right thig by removing that bulb.... it was a goner.
But on the other hand, the plant looks really healthy. I got me a few catasetums and they love to be watered and fed while growing, but when the plant stops growing and flowering you gotta withold the watering. yu can water ver very little but just to keep the plant from totally drying up. The next growing season you can resume watering and voila..... you're an expert at growing catasetums.
If the roots are mushy and soft then they are dead. But if they are firm and white (some may be brown too) they are good roots. Catasetums send out lots of roots when actively growing.
JennS 
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