It's getting even stranger.
On my notebook with Chrome: no sidebar and no space below
On my notebook with iExplorer: still sidebars and space below...
So probably it depends on the resolution of the screen you're using...
EDIT:
Notebook: 1366x768
Problems with iExplorer but not with Chrome
No problems:
Desktop: 1920x1200
iPad: 2048x1356
TRY THIS:
take a look at my site... I expect you see the same side bar/space there.. (seen with your screen resolution)
(I just checked my own site with my notebook and iExplorer.. and YES.. same problems: side bar/space)