I have a pair of AV1300 powerline adapters, one plugged into the broadband provider's hub and one creating a second wifi hotspot at the other end of the house.

The provider's hub is dodgy, my work laptop keeps losing its connection to it. It doesn't have the same problem with the TP-Link network, but that's at the far end of the house and is out of range from where I work.

What I want to do is add a second extender in my office, and just use the TP-Link network at both ends of the house.

Is this possible? Can I add a second extender unit and have them both connect via the unit that is connected to the broadband router?