Training calendar (on watch) not indicating my activity is completed

I have added an activity to my training calendar via the app (or website) for every day in July.  I can bring an activity up (tapping Strength > Training Calendar > Specific activity) and then I complete the activity.

The problem is that after I complete the activity, and my watch syncs with my phone app (usually right away), the activity appears to be not completed in my training calendar. If I bring up the training calendar again on my watch the next day, the activity I completed is flagged with a red exclamation point, as if I had not completed it.  Additionally, the activity is still purple in the web training calendar, as if I haven't completed it. 

HOWEVER, the activity that I actually did appears correctly on my calendar.

So then my training calendar lists the activity that was planned, and the activity that was completed.

Is this the way it is supposed to look?  I know how to delete a planned activity, but I don't understand why the planned activity even remains on my calendar after I complete the activity.