Sorry for the trouble there. What happens is logos of different heights can end up pushing down the sub-menu items which causes them to disappear before they can be clicked on. In the theme options page on the “header” tab you’ll find a field for “drop down distance.” You can use that to set the top margin for the sub-menus. It’s set to pixels so you don’t need a unit, just a number there. Negative values can be used. You might try something like -20 and see how that affects the menus. The more negative the number, the higher up on the screen it will go (-30 will be higher than -20).