Not able to move review population to some of the 9 boxes in talent review meeting

Summary

Not able to move review population from holding area to some of the 9 boxes in talent review meeting

Content

We are not able to move review population to some of the 9 boxes in the talent review meeting. When we try to move to people from holding area to some particular boxes they end up in some other box instead.

We have checked the rating models as well, the boundaries are not overlapping. 

For eg, 

1. Tried to move the employee in 'd' box.

2. The drop-down comes blank, we select 'low' in the drop-down and click on 'Save and Close'

3. Employee ends up in 'e' box