Vestorly interview questions

When I was on my way to the interview I got a call from the CEO cancelling the interview for that day, and rescheduling for the next day. Should have been a red flag right then. The next day I had my 4 hour interview, I met with nearly the whole engineering team, lead engineer, founder of the company, head of product, etc. I got on well with everybody. Long story short I didn't hear back for 2 months until my friend who worked there told me they didn't end up hiring anybody. Several months later they contacted me again saying they were in a better position to hire an engineer and were interested in me and asked me to come back in for another interview, so I did. This time the whole process was a couple hours. After not hearing back for a few weeks and me emailing to find out what was up, I was told that they once again were not hiring anybody. I still feel that I was jerked around. Very unprofessional.