I know enough to be dangerous, but not enough to actually troubleshoot problems.

Our powerline is not seeing or connecting to our wifi (despite one of the adapters being hardwired to the router).  It IS however connecting to another extender network on the other side of the house.  Which gives a very slow connection because of the distance (about 42 mbps)

I've tried unplugging the other extender that the powerline is connecting to to try and force the powerline to see our wifi, but it is still stuck on that extender network and not seeing our main wifi network.

I've tried updating the firmware (although the TP Link Utility app says that the firmware is still 1.3).

Help, please.