MPC Runner interview questions

I have had to deal with a two-step process after the application. I receive a call describing the position and general description of the work and work environment. I came in for a short in-person interview.

I was offered an interview asking: "If you are still interested in discussing opportunities in more detail, can you please let me know: -When you are free for a 30 minutes Face to Face interview (please provide a few dates and times in case your first option isn't available)" I replied approximately 1 hour later stating my availability and 4 business days later have yet to hear back with confirmation. This seems EXTREMELY unprofessional if you ask me and actually made the decision for me regarding IF I actually want the job. I also interviewed several years ago for a similar position and my contact did not show up for my interview and I was actually interviewed by someone who had no idea anyone was being interviewed that day... obviously I did not get the job and at the time did not take it personal although unbelievably unprofessional on my contact's part especially since there was no attempt at a followup apologizing for wasting my time or anything. Just complete silence. If this is the level of professionalism and respect I see from MPC when it comes to potential hires I would urge candidates to stay away regardless of their passion level.