I am applying for jobs. After some rounds of interviewing and problem solving, The company wanted to setup another round of interview. They called me without even setting up an appointment for the call. Moreover, they called a bit early in the morning, at a time when people are usually getting ready to go to work. They apologized for the timing though.
However, is it acceptable to setup calls without even e-mailing someone to ask about their availability ? As an aside, I am not particularly offended by this, but I wonder if this is a serious red flag about the company.
EDIT-The company called to get some information which in most people's estimates would take about 5 minutes or so.