Your schedule period is 15 minutes: from 13.15 to 13.30. And the business process is programmed to start at 13.00, 14.00 and so on.
The time when you want the business process to start is not included in the schedule period.
The business process will be triggered only after the start of the schedule period and before the end. Please refer to the guide on scheduling BPs: https://kb.workfusion.com/display/RPAe/How+to+Schedule+a+Business+Process
For example, in the schedule above, the schedule period if from August 24, 14:30, to September 24, 14:30.
So the process will first run on 15:00 on August 24. Then it will run every hour according to the schedule every Friday, and the last time it will run will be on September 24 at 14.00, because the schedule period ends at 14:30, so the process will not be triggered after this time.