edsBootstrao Pro – Logo in menue – problem

Hi (sorry for my broken English, I am from Germany and outta school since a while),
When a user resizes the window or is using a device with one of the problematic resolutions, the logo in the menue is behind the first menue-point. Does’t look good.
You can see that on the page http://www.vfb-westfalia-wetter.de
Can you help me?
Thx,
 
Manuel