Editor and Downloaded Files from Editor should reflect the same information
The editor states if an ad is rejected because of an inaccessible website. When downloaded, the editorial rejection simply reads that the ad or keyword or website violates Bing Ads editorial policies.
The editor as well as the downloaded export (copy to csv) file should reflect the same messages.
Could you please send me the file you downloaded at firstname.lastname@example.org so that we can further investigate?