Unfortunately, I cannot contribute much to the question on the black spots, but unless they spread i would not worry.
Otherwise those two plants look really healthy to me - the larger rescue looks slightly mistreated about the roots but none visible look rotted.
Good on you for saving the orhapned phal...I have done similar in rescuing some sicly phals from home depot - so far I havent lost any but two are still in critical condition while two others are actively growing leaves.
On repotting, I am sure Mr. Mickelson has more experience than I, but I would recommend considering using new potting medium - not moss; there are a number of great bark mixes that would be appropriate, I use fertilome with some sphagnum and perlite mixed in (those are not necessarily needed, but I like to).
I say so just out of the fact that, by starting with new medium you are guaranteed to know what is in the mix (i.e. fertilizer, LACK of disease or pathogens, etc.) and the repotting will presumably last longer.
my .02 cents
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