One thing I learned just this week was being sure to click on the round you want to adjust (above the players.) I've had a hard time bringing players off the bench...until I noticed that.
Another thing to consider here is that this is a full segment we're playing. I will score a lot of points this week, but I will have burned a lot of starts in order to do it. With the three start limit in place points will be easy to make up, especially later in the segment. Missing a week is not a death sentence.