Frog, I'd suggest you simply change out the Dillon size/decap die with a Lee one. To put it succinctly, Lee decap pins DO NOT BREAK.
I also get misaligned brass from time to time on my shell plate of my SDB. Usually because the extractor warped the case a bit during extraction on the last firing. On close inspection, there will be a hint of warp to the case head and extraction groove. Most cases like this will not fully insert into the shell plate, which makes it impossible to have the decap pin exit the flash hole.
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