These "mistakes" I've seen on the Sport models, so I don't think it's an option and upgrade situation. Either way, the sticker has both charges! ($995 and $1695).
I have seen a couple of window stickers with BOTH the 7.0 AND the 8.4 radio systems listed. This equates to a $995 extra charge. Is it even POSSIBLE to have both? I mean, I know you cant have both systems, but do they kinda mix and match??? I think not.