OK, you did the easy part already.
Re-check the wiring when you have time.
6 out of 10 time is a defective switch but you has TWO out at the same time so it is unusual.
Once again lead me back to the 3 areas
wiring harness
potentiometer / switches combo
burners
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PLEASE OBSERVE THE DANGER OF ELECTRICITY BEFORE STARTING INSPECTIN /TESTING.
Try to do a left to right burner swap to rule out coil burner problem.
It may not sit well or direct fix (please be careful on the placement of the coil unit)
Follow the know good burner unit.
The switch has two portion.
Indication SPST switch and pot.
I'm a true believer of PB-Blaster
I would invert the switch and blast / clean the two problematic switches outdoor.
Clean all connector with PB Blaster and ohm them out one last time.
Please keep me posted on the fix via email.