700 is correct... there are a number of people that don't seem to understand the representation processes between mergers and normal representation votes.
The assumption that AA's unions have made during the US discussions, except for the TWU apparently, is that the AA unions would be the surviving unions and thus would gain members. The APA and APFA seem to think that one of the advantages of pushing the merger is that they would be the surviving union based on AA's size and would gain members in the event of a merger.
Given that AA agents have turned down representation, there would likely be a process simiilar to what occcured between DL's ground employees and FAs and the PMNW unions.