For the most part the phone reps don't know more then we do. They just know from previous years. You also have to remember these guys have had some LONG nights so they are going to give you the easiest answer possible.
I know it's hard and we are all excited and nervous our phones wont get here on time but the best thing you can do is just chillax and wait it out! I know it's hard, trust me this is my 5th preorder and I am still anxious but for the most part you might as well leave the reps alone. Their system is SWAMPED right now of course you are going to get some errors on order status's and things that don't make sense. If you have a preorder confirmation number you are good to go! If your iP6+ says it's shipping in October, well sorry but it probably is. I think the demand was a lot higher then Apple anticipated and they are probably facing some produciton issues.