Probably because you haven't started play or even had your expansion draft yet. FCC was moved to MLS Clubs just before their draft.
This. And 1) The candidate/expansion forums have been a mess for a while and are just starting to get cleaned up. 2) There are legit issues with moving USL entrants too soon (FCC). 3) Miami has been such a long saga that some may not believe it until they see it. Or at least until ground is broke on a stadium. And MLS has a history with announced teams not happening. See MLS Cleveland.