Media-query question for older tablets (i.e. original ipad mini)

Hi Tom and Dev Team,

Just a question about media-query on older tablet devices. My wife has a 1st gen. ipad and an ipad air. The breakpoints seem to look perfect on the newer ipad. But on the mini (which is still 768px), it displays as if it's showing the mobile breakpoint. Any idea why this would be? Is it because of lower resolution? What could one do to try to fix this?

Thanks so much :)