That's always a problem with this type of layout when you adjust pages in uneven increments. If you set up the margins for just the text blocks on the master page, and sanp the frames to them, the text should move with layout adjustment enabled, but the only way I know to move the images to the other side is to anchor them inthe text using a custom anchored object and align toward or away from spine. At ths point it's probably more work to rebuild the file that way than to move frames manually.
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