I did a Google search describing my problem and happened upon this forum. More specifically this thread,
http://sprinklertalk.com/wbb/index.php?page=Thread&threadID=1308.
I'm quite sure I and fwoodall are having the same issue (6 years apart).
I have three zones as well as three programs (A B C)
Zone 1: Grass --> Program A
Zone 2: Plants --> Program B
Zone 3: Trees --> Program C
My intention is to set Program C to run Zone 3 one day out of the week (thursday), at 6:45 AM.
So here is the issue... When I set Program C to run Zone 3 at 6:45AM and switch the dial (be it "Run" or "Days to Water") and return to check the program is correct the start time has now switched from Zone 3 to Zone 1. So now Zone 3 is set to off, and Zone 1 is set to 6:45AM. If I set Zone 3 to 6:45AM again, it will then switch 6:45AM to Zone 2. Set zone 3 again and I will finally have Zone 3 at 6:45AM, resulting in all three zone being programmed at 6:45AM.
I have to set the first two zones to get the third to have the correct start time. After this I have to set the run times for Zone 1 and Zone 2 to 0:00.
Where am I going wrong?