I hope you get answers. However, it isn't necessary to post two threads on the subject. Just give it some time and someone will answer. It isn't me though because I have no idea what you are talking about.
Just did this on the Explorer yesterday. The fee is now $15/person, but is well worth it. The line to check luggage at the Miami Airport was unbelievable. We said goodbye to our luggage at the dock and didn't see it again until we arrived in Raleigh.