Dark spots on Cattleya

[escualida]

Hi all, I had mites a few weeks back and thoroughly sprayed all of my plants with insecticidal soap and it seems to have taken care of the problem. However there is one cattleya that I'm still worried about, it has dark blotches and the new growth seems to have them as well. Could it still be mites or something else? I wiped the spots with a paper towel and it didn't have orange streaks like the other ones before, but some tiny little dots did show up on it. Any help would be appreciated.

Thanks!