Answering earlier questions:
NO trading
Yes, more than one FA may be selected from a team grouping.
And to be clear, and probably redundant, the rights to players who had cards on groupings drafted in Round 1 or 2 CANNOT be FAs, even if unused during the season.
i.e. Johnny Mize's rights belong to Dacelo, if he doesnt auto-draft him, bontomn can get him because he has the STL db-pre grouping. If NEITHER of those two use Mize, he rots on the vine all season----he is not an eligible FA.