MoCA Help with X1 TV functionality & Internet

Hey all, pictured is my home network topolgy.  I recently purchased a pair of Actiontec MoCA adapters to get Ethernet from the gateway located on the downstairs to the network closet on the second floor, through the only wiring present - the single coax conductor.  When I have it hooked up in this fashion, the wired Ethernet network works okay (kind of - more below), but the two satellite X1 boxes in Upstairs 1 and Upstairs 2 do not work.  Upstairs 3 works with no issue.  I toggled the setting in the gateway to allow for MoCA, but that doesn't work.  Also, when this is operating, about every 30 minutes, for about 3 or 4 minutes, all Internet access stops (including the wireless network).  Because of these two issues, I put everything back to the way it was before I started.

I'd certainly appreciate any insight or tips that anyone has.  Thanks!