I guess I don't see anything weird about it. They are actually being very straight forward with you.
Even though your model phone may be able to handle a 2 Gig card, they are saying the phone was designed to only work well with a 1 Gig.
Pretty smart actually. Advertise that the phone will work with a 2 gig card, and then when you have problems accessing all of the 2 gig, CS says, "well, yes, the phone will accept a 2 gig, but may not be able to access it all."
They aren't lying about it as the phone will recognize the 2 gig.