Hi @runn753, good morning.
Hmm, I'm getting a different custom nozzle. If you have four (4) 2 GPH nozzles per tree, that equals 8 GPH per tree, correct? Assuming so, the custom nozzle should be 12.83 in/hour.
Is this watering time shared with any turf zones? If so, then that would explain and interval you're experiencing. If not, please email our support team [firstname.lastname@example.org, attention Emil] to review in more detail.