Hi Lindsey,
They are not the same, but the contractors from Bing that were behind the quality check at that time could have marked that page as duplicative. I saw that happened on Google. Also, I think the issue could be that these two pages look alike in terms of design, and folks from Bing might think there is no reason to have these two pages in the SERPS because they look very similar. They cannot tell the exact issue because you will reverse engineer the problem.
Ross