Scrolling Double Page

I’m working on a new site and suddenly, while working on it, when I visit it, regardless of which of the three pages I look at, they open looking blank with a broken image icon in the center.

But if you scroll the page up, the page comes up correctly, that is, you can see it just the way it used to be.

I deactivated all plugins, quit the browser, but when I go on the site again, the problem still persists.

I was working with the Next-Gen Gallery plugin when it happened, but, as I said, I deactivated it with no change.

I now have all the plugins activated again.

If anyone wants to look, it’s at https://watercolorsbymartin.com. It’s just the first day of development so there’s not much there, but you ought to see the problem easily.

If anyone knows what causes this, I’d be really appreciative.

Thanks.