I just tried this on Safari on my phone - I was sent to Realtor.com as well. I tried it a few times and was redirected each time, even though I typed "realty.com" in the URL bar (and it didn't auto-correct before I hit "Go").
Wow. I'd be livid if I were this guy. That's an expensive domain. Even if it's in the history, the browser shouldn't be guessing at what to do when it gets exact instructions.