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That's not a "redirect" in the sense that velocio is talking about - that's just a straight link to another page on a website with no redirection going on. The redirects that are affected with the dropping-anchors problem are true redirects, those that involve a 3xx HTTP status code. The redirect happens on the server, in the background, after you've requested the original resource. So that's why it's handled differently on timetriallingforum.
(I don't know why NLFGSS uses 3xx redirects in this way but there's presumably a purposeful architectural reason for that)
On other sites, my browser is happy to be redirected from, e.g.
randomforum.com/showthread.php?goto=newpost&t=97074 to randomforum.com/showthread.php?p=2994810#post2994810
or
timetriallingforum.co.uk/index.php?showtopic=92586&view=getnewpost to timetriallingforum.co.uk/index.php?showtopic=92586&pid=1284720&st=30&#entry1284720
the #anchor in the query string of the redirect url doesn't get lost, and the browser jumps to the #anchor when I get there. In the olden days, Opera used to have a problem jumping to an #anchor because it jumped there and then rendered all the images and the anchor point rapidly disappeared off the bottom of the screen, but New Lfgss is the first instance I've ever seen of the #anchor not appearing at all.