Thank you - I was aware of this page and found it to be helpful
I have already styled the menu. Although the menus are working well enough in Chrome and Firefox for us to launch, they continue to be incorrect in IE so we are not able to go live with the dev site on time as we had hoped.
I have attached screen shots. If you open up this page in chrome/firefox you will see the menus are perfect.
In IE the menu continues to be too narrow.