Dim Employees As EmployeeCollection = New EmployeeCollection()
    Dim relations As IRelationCollection = New RelationCollection()
    Dim Sorter As ISortExpression = New SortExpression()

    Dim Filter As IPredicateExpression = New PredicateExpression

    relations.Add(EmployeeEntity.Relations.EmployeeDetailEntityUsingEmployeeId)

    If STATOrder.Client.BranchCode.ToString <> "" Then
        If Not ShowAllCheckBox.Checked Then
            Filter.Add(HelperClasses.EmployeeDetailFields.BranchCode = STATOrder.Client.BranchCode)
        End If
        Filter.Add(HelperClasses.EmployeeDetailFields.JobType = "Phlebotomist")
    End If

    PhlebList.GetMulti(Filter, 0, Sorter, relations)

This now returns 0 records.

• PLEASE provide more info, e.g. what query is generated (enable DQE tracing, see Troubleshooting and debugging in the manual)
• is inheritance used?