MUFG Software Developer interview questions

I was reached out by someone from a recruiting firm. I had a talk with the recruiter and then a few weeks later i was scheduled for an interview. The recruiter ask me for my minimum salary requirement , which i explicitly gave.I had a first phone interview with the VP, the person i was going to be working under. I was not a local candidate so I had to fly to NYC for the face to face interview. I was trusting them enough to pay for my own airfare, ( my mistake). Interview itself was not too complicated. I was asked OO questions, MVC questions and mostly behavior questions. The next day i was told that i would get an offer, which i was excited about. Little did I know I had to send specifics about my base salary and bonuses in details for the past three years. WHO DOES THAT? That was a red flag, they want low ball me even though i told them my minimum salary. I declined. Later on I had a different recruiter from a different company reach out to me, I asked them for the salary it was way below what my minimum salary requirement. They wasted my time knowing that they would offer below my ask.