This sounds about right. I once had an experience just like yours where they did a switch up the day I landed for a month long stay. Or the several times that half the features don't work properly (like no wifi, or the 'kitchen' had no sink, or the front door had no lock!), or the two times when the entire place was is not quite the entire place... You take your life into your hands when you book with Airbnb. By the numbers I have had better luck using Craigslist than Airbnb (which is surprising, but maybe Airbnb automates enough that scammers can get by while Craigslist lets you run proper due diligence).

I'm just going to post a link to Paul Graham's bragging about Airbnb since this is his website and he backed Airbnb from the start, and I would like to think that someone around YC would have enough pride to fix this mess:

http://www.paulgraham.com/airbnbs.html