@kenwestphal Thanks. "Lightbox" is unchecked on all 6 images, and there is no click-through URL. The oddity is that the "positioning" of the Image Blocks (in relation to the Code Blocks) appears to make some of them click-throughs.
Is it possible that the custom CSS Code Blocks are somehow linking to the Image Blocks inadvertently? I've combed through all the Code Blocks, and they're all identical except for the specific content they carry.
I moved the image blocks around, deleted some, created some new ones, and by process of elimination solved some of the hiccups, but a few still remain. I'm not able to share the website at this time unfortunately.