It is only on buddypress pages. Does the sidebar normally shift to the left if there isn’t enough content? I didn’t think it would. That line under the Groups and Members widget should only be the width of the widget.
Sorry, I didn’t explain. The sidebar spans the whole width of the page so if you see the line under Groups, it’s the width of the container. Members is a sidebar widget. Whenever the content is short, the sidebars align all the way left.
Then there’s my css which I don’t even know where to start with.