The blank rows are pushing the meeting time out of the visible space on the student schedule.

Edit fields to include on the schedule:

1. In the schedule parameters, Format tab.
2. Under Detail, Include these fields in the cell as the class description.
3. Remove extra fields.

Alternative solution:

Adjust the time interval the schedule prints by:
1. In the schedule parameters, Meetings tab.
2. Adjust Interval to a shorter time amount.