@retipster The function of these trailing /1 /2 urls is to function as a rough "post index". I think we've all been there when you find a neat bit of content, refresh the page, and then it's gone for good. This problem is exacerbated by sites that change the order of content often (e.g. reddit, facebook) because a tab open for say, 24 hours, once refreshed, would have completely different content.
The trailing bits point us to an approximate location on the page, if not the direct post itself, so when you refresh, you end up back where you were before, and not at the top.