This behavior is indeed strange. Steve is right, the classes that contain the DIV tags are not regular sf_cols ones. What I can recommend for Richard to open a support ticket where we can investigate his solution and determine why this is happening, if possible to provide us with login credentials to the site.
To make sure the problem is not related to the site theme can you check to create new page with no template (start from scratch) and check if this page encounters the problem, this way the cause can be isolated to the site theme.
Ivan D. Dimitrov
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