Not sure what I am doing wrong. I haven't used my old Garmin 405 for 2 years since I bought a new Garmin 10. In the beginning of this year I gave this Garmin 405 (and the Ant dongle) to a friend of my for 3 months. He used the Garmin 405 for running. With the Ant this friend uploaded trainings data to his Garmin Connect. He returned the Garmin 405 after 3 months because he bought his own Garmin watch. Everyting fine. So yesterday I used this old Garmin 405 again for a run outside. After the training I uploaded the data to my Garmin Connect with the Ant. The funny thing is that the data from my training appears in my account but also in the account of that friend that used the Garmin 405 in the beginning of this year. I don't have the login details of that friend. We don’t use the same computers. Can someone explain what is causing this?
