I do not have any CSS on that site.
I deactivated all the plugins without success.
I also re-checked my parameters following your screen cast and everything is OK.
I noticed that the pages is showing as it should in the Customize viewer, but not on the site itself, if that may help. (of course, I cleared my browser cache several times)
Another thing: I used your demo site and modified it by just changing the slides pictures (did not even rename the slides)
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