Hi Christopher,
regarding to your first issue:
Did you set an association somewhere between registration and an event. That could be a way to set an xpath on your datasource.
regarding your second issue:
Simply add a delete-button in your listview, or a micrflow-call-button, that deletes the object.
every object in that list will have a button like that.
regards,
Mark
Yes I did set an association between registration and event, but which xpath do I have to set?
And thank you very much!