Subtask Not Included Sprint But Calculated In Remaining Estimate

Steps to reproduce:

1. install GreenHopper 6.1.x
2. use "Original Estimate" for estimation the Scrum
3. create issues with Subtask. Eg: Parent Issue TST-1, Subtask: TST-2 , TST-3.
4. assigned TST-1 and TST-2 to same user. Eg: user1
5. assigned TST-3 to different user.Eg: user2
6. create Quick Filter in Scrum, Plan mode by Assignee
7. Remaining Estimate will include the Subtask not assigned to user1.