How to correctly position an object within a header?

Hi, i’m trying to position a language selector on the top left corner of my banner. It seems to work but whenever i scale the window it moves to an undesired position. What am i doing wrong? Also the position i put it is 2px off to the right in IE – how come?

Twenty Eleven Child theme

Here’s the link:
https://octopus.freetekno.lt/~tmnr/ecoflok/