Why is my angel statues Moving and keep facing jesus on the cross?

I'm sure you'll find the answer if you keep looking. There may be a slight slope on the bases of the statues or a weight bias somewhere. They could even be magnetic.

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Another possibility: Do you live alone, or is there another person who dusts and cleans up the shelf or table where the statue is? Perhaps that person simply thinks the angel statue looks better when facing Jesus.