I just realized it was a space for the wordpress header since I was logged in through Chrome. When I log out it’s fine.
It looks fine in Firefox and IE. It seems to be in Chrome that the margin is added.
The problem was that I had used my providers click-and-build to install it in the first place and then was told that it doesn’t allow updates and that I would have to re-install it manually.
I did delete a plugin that was causing the errors and that also solved the problem with only one post appearing. And now I’m about to try to look for what is causing the margin using the firebug you recommended.
Thanks for your help!
