Employee name of first Operation is defaulting for all other Operations

Hi

Here is the Scenario

I have a Scenario where 3 People will work on the Operation1 for 0.5hrs and 3 People will work on Opeation2 for 2.5hrs. So totally Duration is 3 hrs and Assigned hours is 9.

Operation 10 Resource Sequence10 Resouce X  Required 0.5 Assigned Units 1  EMP1

Operation 10 Resource Sequence 10 ResourceX Required 0.5 Assigned Units  1 EMP2

Operation 10 Resource Sequence 10 Resource X Required 0.5 Assigned Units 1 Emp3

Operation 20 Resource Sequence 10 Resource Y Required 2.5 Assigned Units 1 Emp1

Operation 20 Resource Sequence 10 Resource Y Required 2.5 Assigned Units 1 Emp2

Operation 20 Resource Sequence 10 Resource Y Required 2.5 Assigned Units 1 Emp3

This i am doing in 12.2.3

Now when i am charging the time for Operation 10 , it is always defaulting EMP1  instead of EMP2, EMP3 when i am charging respectively.