When you have a design that does not fill the full screen you sometimes get the problem where the page seems to shift when you navigate between long and short pages.
This is because of the scroll bar on the right that appears or disappear depending on the length of your scrollbar.
All you have to do is edit your .css file and add the below:
/*Force scroll bar for short pages*/
HTML {
overflow-y:scroll;
overflow-x:auto;
}
