ZBrushCentral

Polypaint Projection, hundreds of white points

Hi,
I have two subtools. They are both at 10mil Points.
Both subtools have the same shape but different UV’s.
The source subtool has polypaint applied that I want to transfer to the target subtool.
These are my Project Settings:
Distance: 0
Mean: 1
PA Blur: 0
When I hit Project All the Polypaint Data does get Projected.
But its not perfect, there are white dots all over the target Subtool.
Is there a trick to fix this?
Much appreciate your help. Thank You in advance.
Intake