Monthly recap is broken

The monthly recap the app gives the user at the end of the month doesn’t actually use the streams from that particular month, but rather uses the streams from the last 4 weeks (or so it seems at least). I personally downloaded the September recap on the 2nd of October, so after the month was over, but the recap was influenced by my streams from the 1st and 2nd of October and the 1st place artist changed completely because of this.