Exercism per week error?

I’ve been on here 9 days, momentum section of my C# track shows 4.6 exercises per week. I’ve done 37 exercises total. If I assume that it is calculating exercises per day and that it is only counting 8 days (not including today perhaps?), then that comes out pretty close. Is that what is going on here? If so, perhaps the text on the page should be updated to “per day”.