Okay, there seems to be a slight glitch in the system.
I input all the information with the 4 children's actual ages and 3 adults, it still came up unavailable for the suites at AoA, CSR, and All Star Music.
As soon as I changed it to infant, it let me book the suites with the extra adult.
It appears giving the actual age throws off the booking system, but your son is an "infant" until the age of 3.
I am wondering if the CM is inputting the actual age and not realizing that you need to choose "infant" to make it work properly. Again, the CM's are not as well trained as the disboards.
I would either book it online or call and ask for a supervisor.
Good luck.
DH is on the phone with WDW now seeking to change our ressie. Thanks!
Just saved $1500! Yahoo!!! Now we can afford a dining plan!