Okay, returning both RE220 units and trying a non-TP-Link solution. Thank you for your time.

The RE220 inside the house is set in range extender mode, and it is only connecting to the 2.4GHz network; given that there wasn't an option for "network adapter", and I didn't want it broadcasting...

I've got a garage about 150 feet from my home with a coaxial cable connecting them. I have been unable to get a consistent wifi signal from the house to the garage; it's just a bridge too far. I've...