We have received reports from a few of our players where their mobile devices are receiving the desktop version instead of the intended mobile version that other players enjoy. This causes them numerous issues, including posts being largely vertical.
And right you are, that seemed to be the issue. The first guy was unaware this setting was enabled in his device.
The other guy seems to choose the desktop version (he claims to prefer that) and the issues that come with that on his device. Not much one can do to help with that.