I know what the issue is, but I don't know how to fix it.

If there's a member who has a handle with multiple non-hyphenated words in it, their profile page will have the address word1-word2-word3.html (since putting spaces in the URL would result in an error).

So the profile for "DC Traveler" has to have dc-traveler.html as the end of the URL or else it wouldn't load at all.

Unless IB can come up with a technical fix for this "glitch", the best solution may end up being having the Community Director, whose handle is SanDiego1k, change your handle to a different name. Send her a Private Message if you intend to change your handle, as IBLib suggests.