I'm glad you finally got someone helpful. Unfortunately...you get a cm once in awhile who is not in a good mood. However, the majority are very helpful.
Last time I booked I called quite frequently with questions and 9 times out of 10 ended up chatting awhile with some great cm's
Next time you get someone not so helpful...get there name. WDW is known for their customer service. I'm sure they wouldn't be too happy about a rude cm especially when you are trying to spend your money there.
Anyway, have a great time!!!