Central Indiana Community Foundation Assistant Controller interview questions

I interviewed with the Controller and Senior Director of Finance who were both very professional and pleasant. It was a very thorough but fairly standard interview with no unexpected questions. Because of other comments on Glassdoor about a lack of follow-up after the interview, I specifically asked if I would be notified if I was selected for the next round of interviews even if I was not selected. I was told I would be notified either way. I sent a thank you letter the next day, and it has now been almost a month since my interview and I have not heard a peep, which in my opinion is very unprofessional. I believe this responsibility, though, would fall on the VP of People and Culture, not those with whom I interviewed.