@Kubisuro I believe I did it all correct, and also got the same amount in most of my zones.
I put the Orbit Catch Cups all over the zone area.
Ran the zone for 20 minutes.
I kept track of ML in each cup, so used this site to calculate the total https://sprinklersystemcalculator.com/audit.html
One example zone had these amounts (in mL)
When I use that website and enter 16.25 throat area, 20 minutes, and all those mL amounts, it says 0.35 inches per hour.
I am assuming the website is calculating correctly?
It just seems strange, my lawn does look very wet after running for only 20 minutes, but I don’t know enough about watering lawns to understand how much water they really need.