There are fives stages to scheduling a participant in Ethnio:
- Add Open Interview Spot Any time you add to Calendar - AKA an OIS
- Invite You can invite unlimited people to a given OIS
- Confirmed Once someone is confirmed, the time disappears for other respondents
- Completed
- Paid (optional)
One thing to keep in mind is you can customize the "Oops Time No Longer Available" page from Scheduling >> Emails & Landing Pages >> Landing Pages, so that if you invited multiple people to a given OIS, they can still pick a new time for themselves, since you've indicated they are at least somewhat awesome by inviting them: