Up Studio 3 paint -> dual color print on Cetus2

i tried to do an dual color print on cetus2. I looked youtube videos from tiertime and did everything like described there.

Preview result looks fine:

Printed result:

Color changes on printer seems not to be a problem.
Purge Tower looks find and to and bottom also … but why the colors an all sides are mismatched.
Why preview differs from printed result … preview ist totally worthless if it doesn’t show the creadted gcode.