for the width, edit the CSSMenuWriter/cssmw_content/menu.css file.
change:
ul#cssmw_content ul.level-1 > li > a {
background-color: #DA4D33;
background-image: none;
border-bottom: dotted 1px #E9E5F9;
border-left: solid 1px #E9E5F9;
border-right: solid 1px #656586;
color: #fff;
display: block;
font-family: "Trebuchet MS", Helvetica, sans-serif;
font-size: 10px;
font-style: normal;
font-weight: bold;
margin: 0 0 0 0;
padding: 5px 5px 5px 5px;
text-align: left;
text-decoration: none;
text-transform: uppercase;
width: 100px;
}
to:
ul#cssmw_content ul.level-1 > li > a {
background-color: #DA4D33;
background-image: none;
border-bottom: dotted 1px #E9E5F9;
border-left: solid 1px #E9E5F9;
border-right: solid 1px #656586;
color: #fff;
display: block;
font-family: "Trebuchet MS", Helvetica, sans-serif;
font-size: 10px;
font-style: normal;
font-weight: bold;
margin: 0 0 0 0;
padding: 5px 5px 5px 5px;
text-align: left;
text-decoration: none;
text-transform: uppercase;
width: 120px;
}
I'm not quite sure what you mean by:
but of course has left them in the wrong position as though they all need padding out. Any ideas ? 
the menu position looks correct to me, can you provide details on how you are expecting the menu to be positioned.
