When you make a garment that has bust line darts, it's a good idea to check the placement before you sew.  You can do this a couple of ways.  1) Pin the dart, then pin the pattern pieces together and try it on before you even cut out the garment.  Move or adjust the dart as needed and mark the changes.  2) Cut the pieces from muslin (or something else inexpensive), sew and try on for fit.  Check even if you've used the pattern in the past!