Went to FAADrone Zone to register my new 2S. Registering as recreational until I have my 107, however, the site is telling me my SN is not valid. I verified that the SN on the unit and the SN on the box match. Since the FAA site says it's not valid it won't let me register. Could it be that I should have said NO to the unit not having remote identification capabilities? When I select 'No' it does then allow me to register. Just don't want to break any rules.