While we are on this type of display problem, here is an other which is less annoying but that has been there for a while on my site.
Regular Post pages like http://lelaurier.net/2016/07/13/reunion-des-volontaires-du-club-social/
whould display fine on PC (including Safari) but do not fill the screen on iPad (both Portait and Paysage) and iPhone (only Paysage). There is a green bar on the right side.
Any idea why?