Robo-Tank v6.0 is Ready - Now v6.5

[pwest]

That did not solve the problem.  Here's what's in my /boot/config.txt now:
dtparam=i2c_arm=on
dtparam=i2c_arm_baudrate=10000
dtoverlay=w1-gpio,gpiopin=4
dtoverlay=w1-gpio,gpiopin=17
dtparam=audio=on
[pi4]
dtoverlay=vc4-fkms-v3d
max_framebuffers=2
[all]

that's it--everything else is commented out.  

I shutdown the pi and did a power cycle.  
Now, here's what I see: 

• Most of the time, the 'Room Temp' is displayed in the left box on the first line.  Occasionally, it moves to the right and 'Tank Temp' appears in the left box, but it displays the actual room temp.  Then both boxes go blank and then the Room Temp appears in the left box.
  
• The tank temp graph has stopped updating (actually, the graph time/x-axis moves, but no data is displayed)
  
• The room temp graph is updating, but the temperatures it is displaying are above those of the room temp, and below those of the tank temp.
  
• Earlier, I incorrectly stated that the ph graph was gone.  It was just hidden by the way my display was set.  It is still there, but it is no longer updating and shows time and values from several hours ago
  

-Phil