I am having trouble containing a blur to the inside of an object which is the objective of this Inner Shadow Effect Tutorial. In the tutorial he clips an offset of a matching shape which he blurs. His blurring results in a crisp outer edge with blurring to the inside of the object, hence giving an "Inner Shadow Effect". Mine maintains a crisp edge on the inside of the offset overlap and blurring to the outside of the object.
I have tried to change the settings in the Filter Editor/General Settings which did not resolve the issue. Any help would be appreciated.