Funny, I did not read the first few posts in this thread.This thread has developed into a dipstick measuring contest.
LOL, I just could not resist the setup for that!
OP, did you get the new one? I'd take that right to the service manager of the dealer. That should be on them. I'll bet they get a few bucks for a new dipstick. Make them cover that. Their mistake. IF they balk, have them grab one out of another 3.6 and compare them right there. (Again, a dipstick measuring contest!)
Otherwise you could post the pics here side by side and bring it to the attention of @JeepCares if the dealer doesn't cover it.
I was only commenting on the post about the 5 qts. I should edit my post to say if you know your dipstick is the correct dipstick then... 8-)