There could be several reasons for this.
It's a good idea for evaluation coordinators to download the Teaching Evaluation Summary page to an Excel spreadsheet by clicking on the download icon above the Summary page grid. This makes it easy to double check your evaluation orders. It's a good practice to run this spreadsheet by your curriculum maintainer before or after you make evalaution orders. The curriculum maintainers should be able to verify the classes and instructors are correct. This avoids problems later in the evaluation process.
Additional resources for useful for faculty and faculty access: