Black spots and other problems

[JKeys]

I recently did a skim over my plants and the results were not good.

Here are a lot of pictures, thanks for your time.

There are lots of black spots, just on the undersides of two the leaves of this bulbo.



I'm not sure what this is on this dendrobium, it is just one leaf.


There are also little black dots on this plant.



Here is one paph. leaf:



This paph has some spots too:





As well as these phrags:







Is this a virus?





And this cattleya:



All of these pants are growing just fine. Also, I flame sterilize my tools before doing any trimming.

Thanks again.