Reviews stacked on smaller tablets

Hi - I have set up a reviews slider that shows three reviews horizonatally. I have clicked 'One Review per Slide' for mobile devices. Both desktop and mobile work as expected. However both on real devices and on Google Chrome emulation, devices such as Ipad Air (and similar sizes) we get three reviews stacked vertically, which is not what we want. Depending on the break point, we want either 3 reviews, or one review. Anyone have any ideas? Thanks - Jon