Rodman, it seems like we may be able to stabalize this affect, but it may mean that we're simply damping the walls of the grooves to absorb and prevent the unwanted affect.
What I'm hearing every time, seems to support Elisabeth's adjacent track idea of one revolution away. It's my thin wall theory, or perhaps it's the composition of the vinyl, I don't know.
In any case, I think we need a better manufacturing standard, because I believe this is the cause of this unexpected result. Otherwise, just suck it up and enjoy.