SYMPTOM:
This document explains how additional blank columns are seen in Excel when exporting a report with just two attributes.
The following scenario was reproduced in Strategy Tutorial 9.x and 10.x:

CAUSE:
This is because the option for ‘Run Export to Excel/Word in 8.1.x in compatibility mode’ is checked.

ACTION:
Uncheck this option and re-run the report. Now when the report is exported to Excel, the additional columns do not appear.
