In the last couple of days I started seeing that at around 4am (Argentina time) when I am sleeping, a workout is added to my dashboard. In this case Iron Man 60 which I actually did a couple of days ago. How can that be even possible??
Not sure. Check your timezone setting. Check your sync sources. Check your planner. If you are still unsure, send support an email with more info, including what actual activities you completed and their sources.