@Melody22 I am sorry to hear that. I had experienced the same before. Whenever a guest complaint about security devices, Airbnb would put your listings on hold for them doing the investigation. Normally this will take about 4-7 days.
Airbnb is infamous for its ambiguity in various areas. Number of guests are just one of them. Among others are star ratings, cancellation policies, pricing structure etc. You may need to add a sentence in your listing that any guests over two are subject to additional charges and please select correct number of guests staying during booking.
I am a little puzzling about the review you mentioned. Did you see the review which was different from the published? Did you mean that the guest revised the original published review after you requested money for additional guest?