Why would PO be getting delivered at 1455? Your argument makes no sense. In all my time, I have never seen PO get delivered that late.
Again, someone with common sense would, knowing they couldn't get there in time, would leave it behind for overflow who would get it there on time. Does you station not have overflow drivers? I thought you worked at a good station? Or are you one of those employees who likes to act like a hero, only to fail but doesn't see the problem with failing customers because they don't matter as much as another customer?