@Susan1441 this isn't a unique to you or unique to these guests problem. It is universal and my current line on this in regard to abb is "this is a feature, not a bug", as @Colleen253 mentions, the abb setup is quite obtuse about such things and in general the hilton doesn't care who comes traipsing thru the lobby so you are really the only one who can solve this problem for yourself. It really has to be so very, very crystal clear before the guests (& their guests) set foot on your property. As @Anonymous mentioned, your rules need to emphatically say No extras of any type, bc no one ever thinks their extra people are a problem:
"this isn't a party, we've been at a funeral"
"they're not spending the night"
"your total said you could accommodate 10, why does it matter that I only booked for 4?"
and so on and so on