I think you can go into the zone, under customize and change the percentages and flow rates. This will manually minipulate the times that the system will water that area. 

I found that works for my lawn, the Smart system sometimes will have something like every 3.17 days water for 33:45, which makes zero sense. 

If you look under the flow rate it will show you how often and how long the system will water that area. 

I tried this, and it’s seems to be working. Jedi mastered the program!