I did a workout today using my Tactix Delta for my Garmin training plan (long easy run), and used the lap button to skip the cool down at the end, then continued the workout. Somehow the watch erroneously added a 30 minute cool down to my time. This completely messed up all my lap times. And my total time.
It lists the cool down as a separate lap, so if I could delete that, I think it would be fixed.