Previous Button and layers

Hi all!  I'm hoping we can chat about the previous button and slide layers!!  Short of creating custom buttons on every slide, I can't figure out how to make the previous button work how I want it to!  I have a few slides that have 3-5 slide layers and when a user clicks the 'previous' button, it goes back to the previous slide, not the base layer.  Any ideas on how to correct this?

Thank you!!

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