You first wrote
> if this mistake had been made on banking system, you wouldn't have heard about it, because it gets fixed and its gone without a trace.
And then you edited it to
> if this mistake had been made on banking system, you wouldn't have heard about it
I was going to reply that if gets fixed and doesn't cause anyone problems, you're making a case for it. I guess you must have understood that too and backtracked :-) I actually loled at the dishonesty.