There are really two different weeks.
The financial week begins early Monday morning (local time)
The training week ends on Thursday evening (US time), Friday morning (Europe)
Since scrimmages can be international, the training update is after the latest possible games.
So the league game on Saturday is at the end of the economic week; but it is the first game of the training week.
So it is ordinary to use the Thursday scrimmage, the last game of the training week to make sure players get up to 48 minutes.