I had two interviews, they emailed saying that they were very strongly interested in my candidacy and that I should expect a hiring decision by the end of the week, and I should let them know if I had any other offers or questions so they could wrap it up. I got very hopeful but they ended up calling me very apologetically saying that they were going to proceed with another candidate. The interview process was fine but I felt that email where they said they were very strongly interested was slightly unprofessional, I hypothesized that they accidentally sent the email to the wrong candidate