BI Publisher report formatting

Summary: I have a BIP report that I need to export (to FTP eventually) to CSV format but I cannot get the formatting to stay.

Content (required): The BIP report needs to export to CSV, per vendor, and then FTPed to them. When I run the report export to Text format all the column header formatting I made are there and the report works as it should. However, when I change the output to CSV the formatting is lost and I get the data as it is presented in the Data Model. What am I doing wrong? Do I need to change the Data Model to reflect what I need in the report?