I actually think I might know what the problem is. When the forums got new features added last week, I noticed the profile URLs have also changed. For example, leet's say a user named 'Bob the Builder' is the 1337th user to register on the forums, the old URL would have been something like: zeldadungeon.net/forums/members/1337-bob-the-builder. Now, it would just be: zeldadungeon.net/forum/members/bob-the-builder. Notice how the spaces in his username are substituted with hypens? This profile you're seeing doesn't really have those in the actual username, but your account URL is the same now that the number isn't listed, so you're getting redirected to the wrong one.
Not completely sure how to fix this except for a username change.