The Update is from Thru-Sunday. Next update is Tuesday. It still has fewer players than BF1 Gears etc.
Sometimes the update gets posted early when some of the data is missing, I've seen it happen multiple times. A game I would be expecting to be #1 wouldn't be, then a few days later it would get updated again and it would be #1. If I remember correctly the Xbox Store doesn;t usually update on Sunday, so I think this is one of those cases of an early update with missing data.