Mike,
Sorry your's didn't work out for you
I've never even had this set on my TS, but I did measure out all of the teeth and blades.
All seems to be within spec.
I know that a few guys on another site had some problems with some dado sets because the arbor on their tablesaw was almost fully threaded
and one or two of the blades near the nut were falling into the threads causing a grove in the dado.
This doesn't happen if all of the blades sit on the solid portion of the arbor.
A couple of guys even filled some of the end threads with epoxy and this solved the problem.
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JFYI......This problem you mention, is inherent apparently to ALL "Craftsman" arbors, (at least the older ones), and possibly could be on other saws, but don't remember anyone mentioning it in those related posts.