I tried to do some detective work based on your questions. I do not do any synchronizing with other calendars
In the process of working on this, I noticed a couple of events that were
not marked completed, but were
not showing in the pop-up reminder window; in the event window, the check marks were still present for pop-up reminders. Today I noticed a completely missed reminder, an event for June 3 that should have had a pop-up on May 27.

- Screen shot of "Event" window shows check mark by "pop-up reminder" and no check mark by "completed"
- Screen shot2 VueMinder.jpg (159.62 KiB) Viewed 20354 times

- Screen shot of "Recent Reminders" shows no reminder for the June 3 event BOPP report. Also note the June 14 reminder listed between April and May.
- Screen shot1 VueMinder.jpg (214.56 KiB) Viewed 20354 times
I'm sure the June 14 event is one that I changed the date on because the doctor's office called me on the original appointment date and rescheduled. It's quite possible that a change in date is what my
problem events have in common (those that either have missed reminders or have had reminders pop up after being dismissed). SHOULD I BE ABLE JUST TO CHANGE THE DATE or do I have to delete the event (including recurring events) and start over to get it to work correctly? Thanks for your help.