Oh I had thought she had booked through the airline. Although another poster later said that when she was booking directly through one airline she was actually booking through the same call center Expedia was using. So I wonder how many other airlines have contracted call centers that are used by the travel sites?

We book both ways, although for Disney we go through their agent. And we had the airline seperate our seats before because they switched planes for the return flight while we were on vacation. We usually have to check in 3 hours early so they had time to fix it.
But I strongly disagree with the idea that age equals maturity and independence. My child is 10, many posters on here have made multiple posts saying something to the effect of 'my 6 year old can sit by a stranger so
all kids can to'. Which is completely untrue and a wee bit of a crazy argument- because we all know that not all kids or people are the same. And all kids shouldn't be judged by what their kid can or can't do. My kid has medical needs (see not the same!) that require her to be by an adult when we fly right now, it also requires that her one medical carry on be in the over head bin above us for quick access and not 10 rows down (and less chance of getting busted up). It's amazing how difficult it is to get your bags near your seat. I dont care where they have to put the other bags I often offer to put them in ala cart to free up cabin space even though shes allowed one extra carry on. I don't feel entitled to a specific seat - even if I selected it when I booked. I feel entitled to a safe flight. But there are some posters who are saying they are more entitled to a specific seat, and care more where their butt is sitting than they are about the safety of other passengers. I just hope they are not in the exit row.
On our last flight we saw a LOT of entitlement issues - one guy who refused to get off his cell phone while they tried to leave and made the steward stand and wait and have to threaten him. Another man who got up when everyone was told to put their seatbelts on for landing with a baby. He may have gone to the bathroom, but he went back to his seat while the plane was landing - as in angled and wheels down, he came from the back of the plane stumbling down the aisle with his baby in his arms while the steward was yelling at him that he needed to be in his seat. I think we're also all entitled to a little less of that insanity.