CSS Width

[Deadly Stream]

First off, I do apologise for the crude title, I'm not exactly sure how to explain this.

I've been editing postbit.css so that the Signature area is the same colour as the User Info area. For the most part I have it sorted but for some reason the area won't stretch all the way across the bottom of the post, at the right side it's level but there's a gap at the left.

This image will show you what I mean

This is the css code I have at the moment;

.signature {
        align: center;
        display: block;
	background: {vb:stylevar postbit_userinfo_background};
	_background-image: none;
	clear:both;
	height: auto !important;
	border-bottom:{vb:stylevar postbit_border};
	border-top:{vb:stylevar postbit_border};
        padding-top:10px;
        padding-bottom:10px;
        padding-right:5px;
        padding-left:5px;
	width: 100%;
	float: {vb:stylevar left};
}

I've tried a few different things and nothing I've done has got it, it either hasn't changed or it's made it worse.

If anyone has any ideas I'd be grateful, me and css aren't exactly the best of friends.

--Stream