How to plot separately 2 or more signals of Temperatures connecting MAX31856+Mux

Hi All,

I'm doing a project using Arduino Mega2560 MUX CD74HC4067 16 channels and Adafruit Max31856 for instant temperature monitoring.
I connect 2 thermocouples to the MUX, in order to start with the simplest configuration, and when I try to plot the temperature, I get both signals together, I'm not able to visualize separately, someone knows how to do it?

In the code I did the switch only for that 2 channels

Can you explain further please?

could I put here the image of the Hardware and the code that I did?

If you think that would help, yes.