ADP Outside Sales Representative interview questions

I had been contacted by a recruiter regarding the position. The interview went well and was passed along to a recruiter for the company in which a 30 minute phone interview was conducted. She approved of me and passed me along to the next stage which was a field ride which gave me an undertanding of the company. The next step was a 1 on 1 interview with the Sales Manager which went well. 3 days later I was contacted and offered the position and was scheduled to fill out paper work in the next 48 hours. The day of the paperwork completion the Sales Manager contacted me and stated they had changed their mind and want to go another route. I have never been given a job offer and have the company turn around and take it away.

I had a phone interview with the HR department which went really well. Then I had another interview with the VP of Sales in the Austin area that also went well and she referred me for a face to face interview in San Antonio. The HR lady that I had the first interview with then scheduled me for a whole day which was suppose to consist of an interview with two managers, then going out in the field with a sales rep and finally a role play/ask for job. I drove four hours for the interview and after the face to face interview they said thanks for coming in, we will get in touch with you. I told them I was confused because I had a whole day set up and they said I wasn't scheduled for anything else. I then called the HR lady to figure out what had happened and never got a response. I then got a rejection letter the next week. The whole thing was very unorganized and very unprofesssional.