User is trying to filter time entries that are submitted, but not yet approved in the Time & Expense Reviewer screen by selecting the options Submitted and Un-Approved in the Workflow Status filter. However, even un-submitted time entries show up when using these filters.
This happens because you are filtering for un-approved time and CORE considers even un-submitted time entries as un-approved. You simply need to set the filter to Submitted, because all entries with Submitted status are also un-approved by default. Check CORE Help Center for details.