I finish reading an article and start reading the comments. At the end of the page, I click Next. I find myself at the top of the next page, but again at the top of the article, which I must scroll through to get to the second page of comments.

When I reach the bottom I click Next and, once again, there's the entire article to scroll through.

The "Next" link should position me at the top of the next set of comments. (Whether or not the article is on the page doesn't matter to me much if my screen is positioned at the top of comments).