Why can't edit by Approver after save by employee

can’t edit by Approver after its employee save and apply the doctype.

flow:

  1. Employee : Save and Apply
  2. Approver (Supervisor): Verify(should edit)
  3. Appraisal Approver : Approve(Submitted)

but Approver and Appraisal Approver can’t edit and save the doctype.

i have use workflow and user permission.

Permission:

but when i uncheck the Apply user permission, it work but other branch employee also coming.

anybody have idea?..
please help me, your help will appreciate