“Botox Upper Forehead Crinkle Mark - Unbalanced Results”

I was happy with the results of my Botox but felt I should have had all 3 areas done together instead of having the Glabellar done 4 wks later. I think this would have made the result balanced.

I had my first lot of Botox with great success whilst visiting my friend abroad in which i had all 3 areas done. 6 mths later I had my next lot in a reputable clinic near to where i live. This time I just had the forehead and crows feet done which was great. I decided though 1mth later to have my Glabellar done also with 3 injection sites and just 2 units in each. the result was great but now have a pucker underneath my hairline,why..? can it be rectified? Thanks.