They are what they are, I treat Lyman molds as one-of-a-kind creations. I can deal with diameter issues, but it's hard to alter the basic shape of a cavity. Of course, Lee has done the same thing over the years. The current 358-125RF is very different from the first ones given that designation. And a two cavity version I had was slightly different from the six cavity version I bought a year later to get higher production.
I can sympathize to a degree. It's hard enough to make a bullet mold, and even harder to make two (or more) identical bullet molds, separated in time by years. But the variation is extreme in some cases, and I won't speculate why.