The HVAC airflow couldn't be balanced today. How did I find out the VAV address was labeled incorrectly?

Today, during an HVAC commissioning for an office, the temperatures in two rooms kept behaving inversely—the hot areas just got hotter as we adjusted them. At first, everyone thought the damper was stuck. I cross-referenced the BAS points, VAV box numbers, field labels, and airflow readings one by one and discovered that the network addresses for the two VAVs were swapped on the drawings. To…