A phone screen was the first interaction with this company I had. That seemed to go very well so the hiring manager invited me for on-site interview. This was scheduled for a week later. When the time rolled around I confirmed with the manager and they sent back something to the effect Oh did I forget to tell you I canceled that meeting? I was like yes you did. Oh I am so sorry. Well the upside is better to find out the manager you might have worked for was disorganized and appeared to lacking common courtesy beforehand than after. :-)