How "So fast" turns into "So slow"

These days I had to get a loan from a bank, I won't give any names. The thing is, this was supposed to be the bank that gives you the loan in 2 days, so they said. The problem is, I am a programmer so I pay different taxes than the rest of the people do. So, they had a "problem" with my salary because their little software was unable to reach the same salary as in my papers. So, here I was, with a salary that could well cover the loan, but unable to get trough the thick heads of some bank people. So the 2 days turned to 4, and that because I was insistent. Also, another "little" thig... To "make this ok" they asked me to sign a request paper with the salary they computed, which was lower than the actual paycheck. I call this forgery. The law also calls this forgery. They call it helping a client. Guess what I did.