In US week numbering i believe that is actually valid, because week 53 can also be week 1 of the next year. Given that in the screenshot the weeks start on sund

In US week numbering i believe that is actually valid, because week 53 can also be week 1 of the next year. Given that in the screenshot the weeks start on sunday, i assume US numbering applies. They probably have a setting to switch to ISO week numbering where it would indeed be week 1.