With taking a peek at your schedule, flex wants to fill up your bucket so to speak on each zone. I noticed that it isn't watering again for about a week and a half. If you want to adjust the minutes, you can use the water drops to dial in minutes on the edit screen.
Rather than explaining all of the concepts around flex in detail how to fine tune it, I am going to recommend our new simpler scheduling that we are submitting to the iOS app store today. Will be approved in 7-10 days.
While flex has worked for a lot of our customers and they are extremely happy with it, for other people it can be difficult to adjust.
This combines both the simplicity of our fixed scheduling with the sophistication and efficiency of flex.
Let me know if you have any questions, and have a great day.