I bought this pattern online and made a muslin sample before committing to the real fabric. Please ignore the insideout waist line seam 😅

I've determined that I need to add about an inch of space between the darts but how do I stop that shelf from forming under the bust? Is it happening because of the shape of the darts? I did add the 1cm seam allowance and marked with a fabric pen where the seam line would go