Systems Technology Group Software Implementation Specialist interview questions

I initially sent in my resume and cover letter via internet job posting. I was then contacted for an interview. I came in, they told me about the job and the company. They seemed to like me (except the fact that I dont use a macintosh computer) I was then asked for a second interview in which I met with the President. At the end of the Interview I was offered a Job by Brian Ulrich from the original interview, and the President Frank Steckstor. I told them I would get back to them. Which I did a week later I accepted the Job offer then put in my two weeks notice at my current employer. A week after that they emailed me saying they took back the job offer I had unconditionally accepted, and now I'm out of a perfectly fine job. All because I interviewed at STG