Did no one direct you to the people in the orange jackets who have those mobile ticket checker things (like a credit card machine)? There were two or three around the CB side of the ground. The stewards at our entrance had a person who couldn't get in on his paper ticket and directed them to the orange jacket person, who checked something and then brought the guy back to the front of the line. (It was a looooooong queue).
Plus, the person who mentioned that the people in the ticket office queue were people on the cup scheme who hadn't paid, the club take the money out of your bank account and if that doesn't happen I understood that they then tell you that the ticket will be reallocated. I know when my bank issued a new bank card and I forgot to change the details on my City account they sent me an email to that effect.
As for the ticket office staff, from the top to the bottom I have never, ever, had anything but excellent, first class service from them. I've had to queue at times when I've gone to buy my ticket for away matches but never had anything but absolutely professional service from them.
I once needed to speak to someone about an incident at an away match and was taken through to the back and sat down with a senior person and discussed it thoroughly and the club sorted it all out for me.