For website http://www.gltcadastra.nl I use J51_Enterprise template.
The mainpage have Side Column Layout S-C-S. Sidecolumn-A 18% and Sidecolumn-B 25%.
On iPad in "landscape" the mainpage is S-C-S as a desktop. That is correct.

When I turn the iPad 90 degrees, in "portrait", what happens then:
[ul]
[li]Sidecolumn-A switches to the other site of the content. The mainpage change in C-S-S layout.[/li]
[li]Reloading the page, the mainpage is shown in S-C-S layout, but after touching the screen the mainpage revers to C-S-S layout[/li]
[li]Despite the changes of the text/information layout, the background-color of both sidecolumns always remains in the S-C-S layout.[/li]
[/ul]

An other problem with the tablet presentation of the website is probably related to the first problem.
For more space to the content info, I reduced the total of modules to a few and put these remaining modules in one column. I got no more space for the content, because the empty column is still there by his space and background color,

Could both problems to be solved; what can I do with Custom CSS.