BigSlam123b
Only happy When It Rains
The plan change is set to occur on June 28th. Your new contract will activate on July 9th. I'm wondering if the VZW rep gave you bad info. It wouldn't be the first time for that to happen.
Activation has nothing to do with the pre order. At the time the pre order was placed you had to agree to the terms of a new 2 year contract. So basically your new contract started as soon as you agreed to the terms. Phone activation is irrelevant.