the weekly standings on a group page just reflects how your team scores in the group. you get the highest total score in the group for a week, you get a win (also a top 5/top 10) even if no one in your starting lineup won the race
Ok,you`ll need to beat everyone in the league your in to have a win. Click on a league you`re in, you`ll see everyone in that league.above that you`ll see 'Week Performance" click on that..it will bring up everyone`s score they have for for each race. It will be highlighted in 'Green' who won/had the best score.