The Johns Hopkins University interview questions

The phone interview was conducted by what I believed the lead researcher himself. The day before the phone interview, he already set up the day and time for the face-to-face interview. I feel like I didn't have a say in it, but just had to agree with it. After the face-to-face interview, I was offer the job rather quickly, with a poor salary offer. I had to ask for additional employment information and the lead researcher gave me the run around and word-of-mouth kind of answers. While I was going through information packages with the HR, the lead researcher emailed me and told me that since I didn't reply to his offer in time, he's going to give it to someone else. I was not told that I have less than 6 days to make my decision. The HR was friendly, but this "future boss" is inconsiderate and unprofessional.