It's a 200 dollar difference. but you're logic is still wrong. YOU did not pay for that surround system. You couldn't have, the build sheet shows it was credited. The truck was discounted at some point to account for this. Be it in the form of an invoice, or on the sticker. Bottom line, this is not an FCA issue, it's a dealer issue.
I get your frustrated, but the build sheets are, in my experience, almost never wrong. Else they would be in a world of hurt. If it says it was credited, then it was. It may be better to ask FCA MASTER ( he's on here somewhere, maybe shoot him a pm ), or call up the 1800 number and play stupid, and ask them what the deletion credit is for. Once you know for an absolute FACT, call the dealer and ask them about it. you purchased a 64k truck, you paid a premium. The dealer does NOT want to purposely screw you, I promise. It's possible the other mirrors made up for the ones wth camera's in them. This happens all the time with ram and other FCA type vehicles. they get additional options, then they get deleted in other aspects of the build.
I.E, my durango has the ralleye package. It comes with roof rails, but the ralleye package deletes them, even though the roof rails costs money, I'm basically paying to have them deleted. Its just the way it works. That's how it was built, because some monkey that makes the orders sucks at life.