Pritzker Military Library interview questions

Had two rounds of interviews. The first was with the HR manager and the second was with the production team. Both went well but there were a couple of red flags. the most notable one was I shared my salary expectations in the 1st interview and was told that I was in (but in the highest part) of their range for the position. I interview over the next 2-3 weeks and get offered the position. However, the offer was 10,000-15,000 below the agreed-upon expectations. I had to turn the position down.