Yes this is related to adding removing dates in a monthly recurring event.
I add a new monthly recurring event, save it, then I go back in and try to remove a few dates via the “Include/Exclude occurrences”. The Include/Exclude occurrences calendar does not show any dates highlighted, yet the event shows the dates on the published events.
This is the basic version of event organiser not pro.
I confirmed this was a plugin issue by downgrading to 2.0.2. Once I downgraded the plugin I could edit the individual dates via Include/Exclude occurrences.
I’m happy to make an export of my info/config for you to compare.
