Yes, there are many different scenarios that are not covered by this sample.
To add more people to the same time and location, you can choose a solution depending on the workflow:
1. To allow more assignments, simply turn off the conflict detection. This will allow adding concurrent events.
2. If there are multiple known positions/roles at each location, you can add the positions as children:
See also:
https://doc.daypilot.org/scheduler/resource-tree/