Issue with Image Height

Hey all,

i have uploaded my logo mith double size, but for any reason on the retina device it displays another height of the image.
maybe s.o. cam help out https://www.bergtour-online.de (top left) / https://www.bergtour-online.de/wp-content/uploads/2012/10/Logo-Bergtour-Online.de_1.png

thx so much

https://www.ads-software.com/plugins/wp-retina-2x/