Well good for you thanks for sharing learn something new everyday so since you have 1st or business class I suggest you use Flagship instead of Admiral club lounge much nicer.
I do find your access to CLT AC suspect as we just went to Cabo with another couple and I actually bought the tickets for all of us and the were all BC and they could not get in lounge and had to be our guest so my wife who is authorized user had to sign 1 of them in but then again you are special I guess. But just could depend on who is at Desk when you enter AC who knows