SEO URIs *AND* $_GET requests - /controller/function/?myvar=1

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I'm not able to get uri->segments located after the query string
like this:

Code:

http://localhost/index.php/home/?myvar=butt&var=2/cheese

I want some cheese please
but this does work:

Code:

http://localhost/index.php/home/index/cheese/?myvar=butt&var=2

That gives me cheese from uri->segment(3) and butt from get('myvar')