When the page initially loads, it appears normal but somehow the width or spacing compensates it seems and the sidebar mashes. I think it's my lack of knowledge of display order, and/or items that were previously there but I had removed.
Also 'New Posts' and other widgets have disappeared despite them being in the layout editor.
I fixed it, I just disabled ALL of the widgets in the 'List Widgets' and the sidebar appeared normally. It must be conflicting with something, I just wanted to change the order in which they appeared. Hopefully I didn't break something else.