Hi Jim,
It looks as though some custom CSS rules have been added to the following stylesheet (which is part of your theme):
themes/eprom_1_1_0/styles/dark.css
In particular this piece of code (around line 1597) is making each nav menu item much wider than it should be – it’s probably intended to target something else but is not sufficiently specific:
.events-list li {
margin: 0;
position: relative;
margin-bottom: 1px;
background: transparent url(img_dark/opacity50.png) left top repeat;
min-height: 64px;
width: 100%;
}
So you will probably need to adapt that (remember that .events-list is applied to the body element and so this basically targets all list items on the page.