Welcome! This forum has a treasure trove of great info – Scouters helping Scouters! Just a heads up, though - all content, information, and opinions shared on this forum are those of the author, not the BSA.
If a reminder has past, please give a way to remove it so that another reminder can be added. In this case, an event was rescheduled but I couldn’t add another reminder.
Also, why the limit of 3 reminders? For events that are scheduled well into the future, more than 3 reminders might be appropriate.
This has already been requested and is in the backlog. For now, you can use the Scoutbook calendar to add additional reminders. All events appear on both calendars.