It looks to me like these last two scans are registration issues on the red pass (not "extra ink"). See how the red overlaps the black borders on two sides, and fall short of the black borders on the opposite two sides? When things don't line up, anomalies occur. They manifest thesleves in different ways. The red is meant to blend with another color and give a specific tone and effect. When the dots are mal-aligned, it gives a different effect.
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