Alternatively, you can set it so that the Report header and the Page header don't appear on the same page, so that the first page shows only the Report header and not the Page header, and the other pages show just the Page header as normal.
To set this, get the Properties up for the entire report, and on the Format tab find "Page Header". Set the value for this to "Not With Rpt Hdr". Now your Report header is your first page header and the Page header is the header for the remaining pages. The two are totally independently customisable.