Every time I try to install a Google chrome theme it is slightly off side at the top?

i dont know what i am doing wrong i have used different websites and different themes!and it just seems to be at the top of the screen a small section

i don't know what i am doing wrong i have used different websites and different themes!
and it just seems to be at the top of the screen a small section has moved

or:i don't know what i am doing wrong i have used different websites and different themes!and it just seems to be at the top of the screen a small section has moved

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