Not a dumb question - you can integrate some orchids, as long as they have the same light and watering needs. For example, I don't think I'd combine a Catt with a Phal because Phals need more shade and don't like to dry out as much.
But Catts could very well co-habitate with Brassavolas or anything Laelia. Or you could put two or three Catts together or two or three Phals for that matter. I have a big raft about 9in. by 18in. with at least 3 large Brassavolas growing very happily on it. It's the second to last picture I posted above. (that was before I knew to use the cork with the hollow side up, but they have wrapped roots all around it now anyway.
Or you could break or saw your piece of cork into smaller pieces - you can cut it with a bread knife, if it won't just break along the fault lines.
