This could be due to a variety of reasons:

  1. The most likely reason is you don't have the authority to approve the entry.  You may be able to view the entry, but it must be approved by someone above you in the hierarchy.  The authority will be defined in the area and will read something like, "Must be approved by any supervisor of the employee with the title of Lieutenant or above."
  2. This may also be a hierarchy issue.  You may be seeing an entry made by a downline supervisor about an individual who has not been properly assigned in the hierarchy.  You can quickly review your hierarchy on the home page.  You will see your immediate subordinates displayed and may expand this list down through the hierarchy.  If the person does not appear in your hierarchy contact the GT admin in your organization to make the necessary corrections.