That´s due to the fact, that your page might not scroll far enough to place the anchor in the top left corner of the browser window.
Means, your content is not long enough to make the anchor reach the top left corner.
You could try to expand the last "page" with some empty space or a picture (depends on your design of course)
or any other content the makes sense to you (graphic element?).
My god... didn't think of that at all.
It worked perfectly. Just moved a picture 30px down.
Welcome all day long,
Oh, my bad. got a wrong link.
No problem, no reason to blame yourself. Your input is highly welcome all time. I hope you are aware of this