OK, I was misunderstanding the Rain Delay icon.
When I manually run an existing program, the UI says the program is running, but it isn’t. Also in each zone I have it set to run 10 minutes, but the timer starts at 9:10 minutes and counts down. Watering budget is set at 100%.
I deleted my existing Program C, and the created it again with the same results.
When I manually run zones one at a time, that works.