While connecting multiple potentiometers to my Axoloti, GPIO pins starting with PB and PC work as expected. When I connect to any pin starting with PA, other pins starting with PA react to the single potentiometer connected to a single pin. It is somewhat random, but PA0 through PA3 tend to act together, as do PA4 through PA7.
Any thoughts or suggestions would be great appreciated as I really need those 8 analog inputs.
The wiper pin on the pot is connected to the analog pin on the Axoloti. This is the same way the pots are connected to the B and C pins which work correctly.
I have tested for a short and there is no continuity between the pins.
This is the screenshot of the GPIO test showing PA1, PA2 and PA3 all moving when only the pot connected to PA1 was moved.
Everything looks good from your pic,
You might need to do testing one pin at a time to see if there are any issues with them individually. Try some of the unused pins as well. Although one thing I would like to ask, the chart in PA1, PA2 & PA3, why is there an immediate drop in the signal, then the gradual increase ? If you want to see if it is working correctly, see if the signal can start at 0 increase to max with a steady turn of the pot, then reverse back to 0 in reverse
Thanks for the response @Gavin. After some experimenting, I found that connecting unused pins to ground seems to have solved the problem.
I haven't seen any ill effects from grounding them, so it looks like I can get on with my patching!
Just wanted to say, thanks so much for posting the follow up. I was experiencing the same issue and connecting the pins at issue to ground worked for me.
I'm having this same issue now where sending a signal to PA1 alters also PA2, and sending a signal to PA2 does nothing, and grounding the other PA pin does not seem to work. I can short PA1 to ground but the signal to PA2 makes no difference and grounding PA2 makes no difference to PA1 controlling both signals. 
