Multiple Issues With Orchid Collection

[jts]

Hello all.

My name is Matt. I'm new to the forums and new to the hobby of orchid care.

I'm having several different issues with my collection that I would really appreciate some insight on.

First, my set up. I live in Massachusetts. My plants are located in a humidity tray, maintained at around 70% humidity. They are located directly in front of a SW facing window, in a room that receives additional light from two south-facing windows. I provide them with air flow via a Vornado fan pointed at the opposite corner of the room. They are fertilized once monthly with a 20-20-20 and are watered once weekly (when the substrate is completely dried out)

Until very recently, the plants had been located against the far wall, approx 10' away from any window. They were moved two weeks ago to the new location because the foliage was staying very dark green and I failed to have anything resembling a bloom. I made the assumption that there was insufficient light.

My first plant was a Brsdm. Everglades Hunter 'Swamp Buggy'. This plant which bloomed wonderfully exactly once, then just started to grow exponentially. It rapidly grew into a small shrub (~3' in diamater). I recently split this plant in half. Both splits appear to doing alright, but there are a couple minor problems. First, there are small whitish spots on some of the leaves (these are not raised from the leaf at all). Second, occasionally the middle of the leaf splits, and when this happens sometimes a black spot is formed around the edges of the split.

I have one noid cattleya whose leaves are rapidly turning completely black (though they are still firm and robust to the touch). I have another noid cattleya that seems to be in perfect health.

I have two noid phalaenopsis that are completely failing to thrive, when purchased they had wet feet and significant root rot. I performed surgery and left those roots that seemed healthy, and the roots seem to be doing alright, but the leaves of both of these are limp, wrinkled, and squishy.

Finally, I have a noid that I have no idea what the heck it could possibly be that is currently flowering and appears to be in the prime of health. I *think* it might be something similar to the swamp buggy by the flower. Go figure. If anyone can tell me what it is that would be great.

I know that I might have several issues going on here, but I hope that you folks could lend some insight. I've tried to attach some pictures so you can see the issues that I described. I'm pretty attached to these plants and I want to make them happy.