It is totally confusing and I will try to explain the best I can since I do not understand what is going on with my watch. First thing (which has never been a problem before) my spouse and I share the same iCloud Apple ID. The reason we have not gotten separate Apple ID's is we have Apple Music and we have the single user account and if we get separate ID's we would have to pay for a family plan. I rarely use the Apple Music, maybe once or twice a month. Only one of us can be signed on at a time and it has never been a problem. So this is why I do not want 2 different ID's Now here is my problem. I updated my iPhone 7+ and my Watch (series 0) this morning. Then my spouse came home from work and updated their phone. I am not sure if my problem started before or after their phone update. I usually walk about 10 miles a day and today I was having a lazy day. I looked at my watch and it said 7.75 miles (I knew I had only walked maybe 5 miles max) I looked at my spouse's watch and it said the exact same as my watch. So their miles are on my watch. We tried to update the other watch and we kept getting an error message that it could not be updated. We unpaired and paired both watches. Then I went for a small walk and my steps and distance did not change even though I was using the outdoor app that showed I walked almost 2 miles. Then when I came home they went for a walk and it showed up on my watch. I looked at all my old workouts on my phone for this month and none of them are mine. We see our individual workouts correctly (when using the app) but our steps, distance, calories all are the same but if I look at the time the exercise was done on the graph that is correct. When I look at my watch app on my phone it shows my watch serial number correctly. So besides getting 2 Apple ID's what can we do? This has never been a problem before.