When I choose content-sidebar layout, left sidebar goes to right and it becomes a “content-sidebar-sidebar” layout with 2 narrow right sidebars. In otherwords instead of 67.75%+29.48%, it becomes 67.75%+14.74%++14.74%.
You can see it at http://baglarbal.com/wp/
Baglarbal, I dealt with this a lot too — the way Esplanade handles columns is a little wonky, and it seems the values you enter to customize column width are saved in more than one place and may not be easy to reset. Basically it appears that two columns are handled in content-sidebar wrap in the css, and the third is handled elsewhere; thus two columns end up being instructed to “float right” which leads to some unexpected behavior.
Unfortunately I can’t recommend many solutions which don’t require tackling the code, but if I were you I might try removing widgets from the sidebar and then replacing them, and also reverting to the defaults of various column layouts in the design. Good luck.
If you want a sidebar that stretches the full width of the sidebars container you can use the Top or Bottom sidebars. They are basically in the same container, they only stretch as both the left and right sidebar.