Motion Vector excludding inside edges

Hi guys,

I'm having a problem with rs motion vector. I uploaded an image to help explain my problem: HERE

In image 2 the motion blur is correct when its over the alpha, but not on the inside part. THe inside looks like it wants to create a blur but then it stops at a hard edge. Is there any way to fix this? I want it to look like image 4 but nothing seems to be working.

What's even more strange though is that image 4 came from the lower part(same frame) of image 2 so it's doing it right and wrong on the same layer with the Motion vector applied.

Any ideas would be great. Thanks