RE: #2 Possible causes. Did you accidentlay have it in there twice when you saved the material? did you apply the material to the same place twice? (should delete the old ones, but not sure if it always does.) did you copy and paste nodes or use "apply to all"? suggestion: use the "remove detached nodes" wacro before saving materials (hold down shift while hitting the button to applie it to all materials zones of the object)

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