I have "first day of week" set to Sunday.
I go on Sunday for a nice long run.
Connect adds this to *last week's* intensity minutes graph, and continues to show the week as starting *tomorrow.*
This is true for all the other graphs as well; in short, the "weekly" view doesn't honor the setting for "first day of week" that I have specified.
The desktop (web) interface, however, counted my miles as on the *current* (starting with Sunday) week.