The reason you get head nods when you relate this experience, in my opinion, is that versions of this sort of thing are all too common when hiring sales people. Sorry to be biased, but I'll go as far as saying that there's a certain separate species in the sales world. By now I recognize a lot of the signs, but it cost me hundreds of thousands of dollars and a lot of lost business to get there. Just ask fellow entrepreneurs "What's the secret to hiring a sales person?" and watch as the first reaction is eyes rolling.
If business where easy everyone would be doing it. Don't give up, you'll figure it out.