Yeah, I know you're allowed a carry on and a personal item, but the girl just didn't know her job, or was in a mood and felt like throwing some authority around, much like tsa like to do.
Airport employees aren't the brightest bunch(though I know there are exceptions)
I was connecting through CVG and got done through immigration way early. So I had a 6 hour wait. I went to the desk, as there was a flight leaving 2 and a half hours from then. I asked if I could go standby on the earlier flight, and the delta employee told me "oh no, ever since 9/11 you can't go standby on earlier flights" and I said umm...I do this itinerary every 2 months, and I've done this a lot, since september 11th." And she said it was against policy, blah blah. So she called another worker over to confirm her story. I just was too tired to deal with them, so I just said okay, and left. I was talking to my dad, who said they were wrong (he is a pilot) and my fiance who is a pilot in the UK, who also said it was wrong. So my fiance sent me a link to deltas website confirming I was right, saying that changing flights with priority and going standby for earlier or late flights is a perk for frequent flier. By this time the flight had gone, but I took it up to the desk just to prove my point. They apologized and said they were unaware.
I personally think these "young" people are a waste of money. Place the plastic bags at a table as you enter the security line, with a big sign (which already exists) that says they all must be in one of those bags. The line can get confusing because people don't stand in a line. They just spread out so its hard for inexperienced travelers to know exactly where it starts. The young people don't even usually answer people if they hear people talking about being confused about the line. I end up helping people to the right line more than the airport employees!