LOL, that is too funny! Thanks Dave...
You should not use the IP because it could change at any point in time and if it does, you'll be out of luck. If you use the real domain name, you're protected from that circumstance. Not to mention, it can be a pain when following links because cookies are 'domain' specific, so if you are using the IP address and then follow a link that specifies the domain name, the system probably won't recognize you as a user and will require that you log in again (and vice versa).
Anyway, not a huge deal...but thought an explanation might help. Unfortunately, it won't let me edit my last post so I can't correct the typo in the link display, but as you pointed out, the actual link itself does take you to the right place.