Summary Report not displaying additional columns

I'm trying to create Summary Reports but only ever receive the created date/name, modified date/name and sheet name columns to select from to add to the report. I've tried saving and going back in but no luck. The sheets I'm selecting all have the same column names as they were duplicated with the save as new function.

Does anyone know how to resolve this? It's very frustrating and makes the summary reports pretty useless!

Answers