bootstrap offset scrollspy not working

I don't think offset does what you think it does. I Doesn't determine the 'scroll-to' position. You'll have to do that with padding.

Offset in this context means the distance between the top of the screen and the section you're scrolling to. In other words: all it does is determine at which moment the navbar > a tag changes to an active state.

Yes, offset is only there to determine when your nav link is highlighted. Not to position your screen when clicking on the link. I.e. the scrolling part is up to you. You can use a little JS to do that like this:

var offset = 80;

    $('.navbar li a').click(function(event) {
        event.preventDefault();
        $($(this).attr('href'))[0].scrollIntoView();
        scrollBy(0, -offset);
    });