Thank you for the screen shot. For future reference, this support article has hints on taking a screen shot.
You are looking at a view where there records are grouped by the event. However, you have not selected an event for the record. You must manually select the event for each record. The {Event} field is probably hidden in this view. Try showing all the fields in (click where it says “1 hidden field”) to see the field where you can select the event.
You may also want to read this support article about how linked records work.
