I've had this happen twice - once a while back in a job I actually took. They told me they were hiring me as a marketing manager. Then once hired said, well, it's going to be account executive. I was a little put off, but they said they'd give me a whole county to myself. I thought that might be okay. Go through the two-week (almost utterly useless) orientation and report in to the office where they tell me I'd only get half the county.

Turns out the half of the county I got was already over-saturated and every single customer or potential customer I contacted over 6 months said they hated the company I was working for. Every single one. It was unbelievable.

Actually, I've often thought of writing the stories of my employment. I have quite a few doozies.