When you go back, is one of two things happening:
1) The URL contains a #comment2464684 bit (i.e. it jumps to that)
2) Your browser is being smart and taking you back to the bit of the page that you were last reading, because you've pressed back
There is nothing that the site is doing that has changed, or would do anything outside of the above. Which would make it a browser issue.
It happens both when going back to the "following" page as well as, like I said, unread pages, where there can't be a "bit of the page you were last reading".
The URLs do not contain any special bits.
So browser issue then though that's weird as my brother hasn't changed either.
When you go back, is one of two things happening:
1) The URL contains a #comment2464684 bit (i.e. it jumps to that)
2) Your browser is being smart and taking you back to the bit of the page that you were last reading, because you've pressed back
There is nothing that the site is doing that has changed, or would do anything outside of the above. Which would make it a browser issue.