2

Don't click Change Selections - instead on that edit page change the participant status from Pay Later to Registered, and then lower down in the Payment Information section change the payment status to Completed.


2

Welcome to SE! In this: [event_calendar component="event-calendar" id="<>"] the <> should be replaced by a number - eg id="1"


2

If you use a civi Price Set, you can indeed set an option on there to not count towards your Participant Count which i think can therefore deliver what you need


1

I see you're on 5.34 - your url looks wrong. See https://civicrm.org/blog/kcristiano/civicrm-526-and-wordpress-important-notice where there was a change in 5.26.


1

I've had a similar issue about increasing the waitlist limit. Check that the relevant scheduled job is running: Job.process_participant. This handles processing the waitlist participants. Read more in the User Guide. You'll also need to make sure that you have a cron job that triggers the scheduled jobs (or you can run it manually).


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