Mail sent to wrong event participants

Something seems wrong with my ‘Send mails’ function.

We have three events on our list, each one day apart. I wanted to send a reminder email to the registered participants for the first event, and included myself in the list for verification.
But I never received it, so I assume nobody did.

When I click on the CSV Export link at the bottom of the ‘Send mails’ page it exports the CSV for the last of the three events, instead of the selected first event. Could I be right to suspect that the mail has also been sent to that list, instead of the correct one?

Please advise, TIA
Leo

https://www.ads-software.com/plugins/events-made-easy/