Not uncommon mistake, happens to seasoned engineering types due to lack of convention. Really have to look closely sometimes.
Might be worth looking for a dianostic chart or procedure for that control board. It might be a bad input device vs the board. Like an output shaft sensor or eq.
I just repaired a furnace for a friend. Two repair guys looked at it and hadn’t fixed it. They both defaulted to swapping control boards. After diagnosing it, I found the problem. The power input ground wire was loose. The flame proving circuit used flame rectification and relied on accurately reading ground leakage current from the hot surface ignitor. Worked for two years after initial install with a loose ground…until one day it didn’t. 