This has never happened before but when my husband recently uploaded his garmin 910 xt actitivies to his account they also showed up in my account which I have synced to Training Peaks. I had to go through and delete his workouts. We have two different accounts. Anyone know why this happened? I tried using different ant sticks but it didn't help.
Start Garmin Express. Select your husband's 910XT from the dropdown box on the left, then click the Device link on the right. Scroll down to the Garmin Connect Account section. Do you see his account information or yours there?