Once Upon a Time, in an industry far far away, candidates for airline positions were only required to contribute their time and talent. That time and talent were usually very hard won, so it was only reasonable to expect a process based on professionalism.
Today, airline interviews (especially with the Rat or their subs') have resulted in some Beancounter's beachside Condo', for which every candidate has had a hand in funding!
Don't be surprised if the number of interviewees greatly out numbered the positions available. That my friend is probably why you have been left confused. That my friend is exactly what they think of you.