Yes, you are watering too much.
Basically what Michigan Farmer stated.
I suggest you just let your "solar sync/seasonal adjust" do it's thing and set your rotary zones to 25 minutes and spray head zones to 5 minutes and run them every other day. You can go to weather underground wunderground.com, put zip code in search and then select your "home monitor". There are many weather stations active in TV so select one close to your location. You can monitor rainfall from that station.
I fertilize with Milorganite mid-April and again mid-May. Don't cut lower than 2.5" and 3" is ideal. I scalp the lawn once when it starts raining in June to 1.5" to remove thatch.
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