If you use the export function tab at the top of the "snapshot" page, the pdf report produced is for the first 24 hours of the campaign. You can get a csv file for a longer period by exporting from the "opens and clicks over time" page. Can you get the pdf report for a longer date range than the first 24 hours?
Hey hopwood, welcome to the forums! You can't export a pdf report that displays longer than this initial 24 hour period, I'm sorry to say. That said, I'm happy to add your vote for opens and clicks over time and keep you updated if it's something we add. Many thanks!