Bug In 3.236 Found!
OK, I updated from 3.204 to 3.236. Stored timer worked fine, but then I created a new one that failed. Upon investigation, it appears that the Advanced Timer Layout in 3.236 is the source of the problems.
I have some timers that run on specific days of the week -- for example, the water pump starts earlier on Monday than on other days of the week so that the shower is ready for an early-morning flight. Once you click on a day other than "daily", then 3.236 inserts start and stop dates into the timer. Unfortunately, it inserts "January 1" to "January 1" and the timer ignores changes to the date fields. Net is, you end up with a timer that seems to work on one day of the year only.
I've backed off to 3.204, will modify the timers I want to use, then load them into the CM15A. If I get it done in an hour, then we'll have a definitive answer. Once I know that the timers are working, then I will post again.
Thanks for the pointers and for being so helpful, Boiler -- you put us on the right track!