Meeting someone with the same name

I have a fairly common name and have often come across people with the same name, but hardly ever met one face to face. Once I was mixed up with another customer at my bank who had the same name. In the 1990s I worked in Bishopsgate, London, and joined a swimming pool where we had membership cards with photoes on them. We had to give in the card when we went to swim and collect it as we left. Once I arrived, handed over the card and the receptionist looked at it and said - this isn't you! He looked through the other cards he had and found mine -the same name but a different picture. I had been given the wrong card the last time I had swum but had not checked it, and never saw what my namesake looked like! I must have been swimming at the same time and never knew...then I wondered if she was the same one who had a similar bank account and if we had been tracking each other for years. I also met someone recently at an Antiques Fair who was a dealer, as I had been in the past. She accused me of causing confusion because when she had booked her place, they thought she was me.