Hi guys, need some help with removing segments from a data source. I am using the wrench icon on a data source to mark segments unused and then running the kill task for unused segments. The time stamp I'm using is for the interval - `20150912-01-01T010000.000Z/20150912-01-01T020000.000Z`but the interval being picked up in the logs is totally random ie

1000-01-01T00:00:00.000Z/3000-01-01T00:00:00.000Z

and of-course my data is not getting taken out. Any ideas on what might be going on?