After a report has been deployed to a report server, you can view it using the OfficeWriter Designer toolbar, or from Reporting Services Report Manager.
You can also export OfficeWriter designed reports through Reporting Services Report Manager. To do this, open your browser and navigate to the Report Manager (usually http://<ReportServer>/Reports). Navigate to your report and open it.
What you see on the screen is not the report layout as you designed it in Excel using OfficeWriter. If your report was designed with MS Query, you will see a listing of the raw data returned from your report's queries. If the report definition was originally created with Visual Studio (or another tool) and modified with OfficeWriter, you will see the original layout, not the OfficeWriter layout.
To see the report as you designed it with OfficeWriter: