I was able to get the tickets through preferred seating.  After clicking on preferred seating it brought up the Roanoke VA, concert showing the link was open and Vienna VA and St Paul concerts were listed below it and I was expecting each one to have a separate link that opened to go in and access the tickets, but found out that the Roanoke VA link brought you to all three concert seating and then you were able to select which concert you wanted seats for.  Hope you were able to get tickets.