Right now you site still has the rule
#content {margin:30px;}
Which causes the sidebar to stacked, So if you fixed it you may need to clear your cache so I can see
You still have an HTML problem, both content and primary sidebar are inside a font tag, which means you still have open / close HTML tag errors. Any html tag you open must be closed. ie: <font>….</font>
I don’t understand what you mean by ” It is still not auto setting width to fit content and widgets side by side.”
You should not need to do anything when the problem is fixed. If you still have an issue please elaborate.