I also recommend going to the installer zone (while I have no idea what exactly is in there). I can't speak for DIRT, but as a Dish employee, I can tell you, when I do talk to installers with Hopper/Joey install problems, I can only give anecdotal advice based on what I know from being there a good while. The 1303 error code has a troubleshooting flow that involves resetting the Hopper, resetting the network from the Settings/Network Setup/Broadband screen, then doing a whole home reset (unplug all Hoppers and Joeys from the power, then rebuild it back by plugging in the Hopper, waiting for it to fully load, then plugging in each Joey). After that, our flow says to...wait for it...send a tech to the site to resolve it.
My experience (hey, we're all somewhat limited on Hoppers and Joeys), limited as it is, makes me wonder about the cabling between the node and the units, like dvrexpander said. Also, every Joey getting a 1303? If only 1 or 2 Joeys, move it (a Joey) and see if the problem follows the receiver or stays at the location.