I'm pretty sure that there is a lot going on that we are unaware of.
For example, we know that Seth McFarlane did not see Aaron when he escaped from the prison van with Adam. So how does he find out it was Aaron? Unless Emmerdale are now going to change the story and say that he was seen? Or, is Robert putting on a show for Joe and Noah in that video clip? It's just that we know that Robert telephones the police and has Joe arrested for stealing the lorry. I think that Joe has been tricked by Robert and Jimmy into handing over money and not really buying anything.
This all leads me to believe that Joe is somehow involved in the kidnap of Aaron. He is doing it in order to try to get his money back. Whatever it is, I'm looking forward to it.