Sportal: menu pages on mobile device

I have noticed this happens on the demo as well. When I view both my site and the demo on various pages they don't always fit as well as others. The home page width is perfect. Then I go to other pages and the width is larger or sometimes smaller. I thought it might have been the ones I created as new but not the case. I did not see any post on this unless I missed it.

If for example you have image in content and you fix it's dimensions to some values it may prevent layout from behaving properly. Same stands if you put some other tag and fixed its width and height. For ehample this would be proper style for image responsive behavior:
<img style="max-width:100%;height:auto;" ...