First, because the webpage does not refresh automatically, to check update on the sensor status, you need to refresh the page.
Second, if you are using the same sensor as I blogged about before, that one is normally closed. So the ‘normally open’ checkbox should be off (I thought it’s by default set to off, but I could be wrong).
Next, the current firmware (2.0.5) handles rain delay / rain sense in this way: once rain delay is activated or rain is detected through rain sensor, it stops the current running program, and once the program stops it will not resume even if rain is deactivated during the program run.