That darkened death as in picture #1 is cattleya black rot I believe.
You want to remove that portion and spray with fungicide. It will spread. Isolate the plant if you can and do not splash water on to other plant.
Overall, I do see some minor fungal (potentially) spots and marks, and these could also be part of viral issues, but this of course you cannot be sure without testing.
If you value them, get a home test kit for virus and find out for sure.