I was sent full details of the bonding arrangement prior to interview. I obviously cant speak for other people but I was also asked at interview how soon I could join and I replied that it would be 3 months after I resigned from my current job and I wasn't going to resign until I had received a formal offer of employment from SIA Cargo, complete with full bonding arrangements.
I received the formal offer (with all the bonding details confirmed) within 1 week of interview. Only then did I resign from my then current employer.
It does seem strange that other people were treated differently.