Menu Moving when screen size gets to about 1025 pixels or less

I’m not sure what its called exactly but when i resize my window down there is a setting in place that flips the menu to the top/drop down thing.

Is there anyway to over rule this setting or change it so that my menu stays on the left as the Links i have added under the menu disappear completely.

http://bmd.taurusmedia.co.nz