My RX-V6A has what looks like identical settings for adding Zone 2. It can be confusing if one has a 5.1 setup in the main room and wants to use Zone 2 speakers somewhere. There isn't really a setting for it and one has to pick between 7.1 + Zone 2 and 5.1.2 + Zone 2. 5.1 setting is "basic" and does not allow addition of Zone 2. Kinda' silly. Receivers need to be more flexible. All seven amp receivers should allow for 3 zones at once with 3.1 in main, 2.0 in Zone 2 and 2.0 in Zone 3. One could set it to party mode and have the same music in the living room, kitchen(or basement) and patio.
Oh, I totally forgot about configuration AFTER amp assign. When set to 7.1 + Zone 2, set back surround speakers to NONE. You will hear a click as those amps turn off. Then, exit setup. Switch the MAIN/ZONE 2 switch on the remote control to Zone 2 and press POWER. You should hear a click as the amps for Zone 2 turn on. See if sound is output to Zone 2. If so, all is good and those two amps should click off when you power off Zone 2 and go back to 5.1 setup in main room and will not send a signal to surround back speakers that are not there. Once amp assign and speaker configuration is dialed in, I recommend using the MusicCast app to do switching of sources in each room. Setup isn't too difficult in the app and once done is really cool.
I keep forgetting stuff, lol. Since there are 5.1 speakers in the main zone, setting surround back speakers to NONE will reroute info from the surround back channels in a 7.1 track to the surround speakers in the 5.1 setup so the info is not lost on speakers that are not connected to the surround back terminals.