In response to your comments:
Yes, I want to meet everyone who is staying at my house. This is not a hotel and I make it clear that I want to be sure of who is here. It is my obligation to know this because it is about the safety of all the guests who are here. I told you this when you came to check in early, and as you said in your comment, you ignored this request. Meaning that you were not able to make time to accommodate the few minutes it would have taken to make this introduction. When I made the comments to you regarding this situation the next day...you were, in fact, making the decision to ignore my request again. I am sorry that your girlfriend thought that I was insulting her, I think you were both disrespectful to me by ignoring my simple request to meet all my guests before the end of the day of check-in. I allowed you to check in early at 2 pm and at that time you told me that I would meet the second member of your party before the end of the day, that did not turn out to be true.
This was your first Airbnb experience, so I think you did not take into consideration that anonymity is not possible like at a hotel if your host resides at the listing they will want to know who is in their home just as I do.