Unable to record all episodes of series - DirecTV

We finally have everything up and running what I thought was smoothly. We are able to download shows from our genie to either or Galaxy tab or phone. The issue we are having is that if it is a series that has more than one show recorded, we are only able to record the most recent show. The download arrow of the older shows is greyed out. How do we work around this so that we can watch series from the beginning. We travel a lot and want to download them to the devices since we don't always have an internet connection.

This question, "Unable to record all episodes of series," is about DirecTV channels, programming, equipment, and sports.