Wrong owner assigned to Promised callback task

Dear Collection's experts,

I would be more grateful to you if you could help me on the below issue.

As support consultant, I ran the "IEX: Create Dunning and Broken Promise Callback" program and callback tasks pertaining to Broken promises have been created. However, I wondered when I saw the owner name assigned to tasks. It is My employee name which is assigned in user creation window assigned as task owner instead of collector name assigned to that customer. Now, the actually collector from Business side who is working with that customer is unable to see the tasks created.

What is the main cause to have had my name as task owner instead of collector.