Yes, that is what my post was about.
The menu is not showing all of the pages in IE because there is corrupted formatting in at least one of the entries, probably the entry after the last one displaying in the list.
This corrupted formatting is breaking the display of the menu in IE.
to address the problem will require editing the entry using the CMS Admin console. Since it is not displaying properly in IE, you will need to use FireFox to perform the editing.