Hello again. Here's my 2 cents for what it's worth.
First and second pics do indeed look like sun damage. You also mentioned exposure to lower temperatures, so the damage could be related to both. I would not remove the leaves unless they develop signs of black rot. A phal will generally let go of damaged leaves when it's ready. Under normal circumstances they will gradually yellow, shrivel, and then drop off. If you prematurely cut them you'll risk the introduction of bacteria and fungus. It's usually better to let leaves die and
drop on their own. Also, the first plant has a lot of damage so expect to loose multiple leaves. In the future it might produce a basal keiki as a survival mechanism.
The second phal might not loose the damaged leaf, however the cosmetic damage is permanent.
Not sure what's going on with the 3rd phal. I'm guessing the plant was shocked when the two leaves were removed. Perhaps the plant is trying to rapidly replace them or...and this is just a guess... it might be developing a terminal spike...something I have little knowledge of.
The young cattleyas and psychopsis probably are receiving too much sunlight. They're still rather young and tender, so I would back down their sun exposure to oncidium level or even a little less.
Your doggy damaged phal will likely develop a basal keiki if there's at least one viable leaf with healthy roots. Junebug is prescribing lots of TLC and patience for this one.