Adding length to the front yoke when doing FBA in the cinema dress

I got the cinema dress pattern and carefully reading the FBA instructions (as I have to do one :) In the process of doing the fba, a length is added to the front side panel in two places - at the waist (stage 4) and at the curved front edge of the pattern piece (stage 5, when the dart is "closed), but a length is added to the front yoke only in one place and according the the drawing only to match the length added at stage 5. What about the lnegth added at stage 4? I know it sounds vague, makes more sense when looking at the instructions. Thanks! Tali