Hey,
I think I am having a similar problem. I checked all the things you wrote above, but somehow the full width is not working for me!
There is more, I think there is some kind of a bug- when I edit the slider and preview the page-it is full width but it adds back the breadcrumb and title area, although they were disabled!
When I go back to page settings and save the page again-breadcrumb and title area disappear, but slider is not full width.sooo frustrating.
Any ideas what might cause this?
Thanks,
Iggy