Graph display of fasting

When I look at my 'trends', the time that I fasted isn't correctly represented on the graph. As an example, I've fasted overnight last night and the night before. So 6/14-6/15 and 6/15-6/16. The shading makes it look like I'm fasting starting the 15th and starting the 16th. Why doesn't the shading go in between the 2 dates?

Answers