Have the tracking code (key values) you are checking for, been collected in the reporting yet i.e. are they reflecting in the default report (Campaign> Tracking Code) as line items?
Classification data would only show for key values post their collection in reporting.
How much time has past since you uploaded the classifications vs. checking the reports? It generally takes 24-48h for data to show up in the classified reports (assuming the key has been recorded)
When using and resaving older template files make sure encoding is not an issue. Some programs like excel can change encoding so when you try and upload it fails.
Try a text editor when adding new rows then resaving template file.
Also make sure you check overwrite data if applicable.