Well, it looks like it is just a very few threads, for a very few ppl, so hopefully, it won't be a high priority, or a time sink. There are probably a LOT of more urgent things going on.
So did the forum say 'Error: Page not found' but not direct you to the appropriate thread? That could be a forum issue, so if you can provide any links or any information, we'll certainly look into it.
I believe the thread that Azure and i were discussing was detected as spam and removed. To close my input here, and in answer to the question, the site did not automatically redirect, presumably because it was no longer in the forum.
I had this also occur when a subthread I was OP in was moved,
The original attempt to enter the thread that failed was made from an email that ended with the ERROR thread not found.
I tried to access it via the Main menu, since i knew that I had entered the posting in Discussions. I could see the title etc, but it was greyed out. I was unable to activate the redirect, or view the link, so I had no idea what had happened to it. I used a manual search and found it eventually in Mind, Body, Spirit subthread.
I could not get it to redirect me automatically, so this could be a technical issue. I am running Firefox on Win 8.1.