Are you sure you're actually moving anything?  I don't have PP2010, but in earlier versions the SetX/SetY/SetZ don't have any effect when applied to a WORLD vertex.  They do what they're supposed to do when applied to a plain old Vertex.  I tried just now with P9, and nothing moves.

The orthogonal cameras always make weird renders.  When things are partly transparent, internal parts will overlap external parts as if they're in the same plane.  This plane-sharing could give a dotted appearance.

Here is MrSparky's Lady Danbo rendered in Front Camera with 70% trans.  Note how the neck seems to be in the same plane as the head.

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