Help! Engine Malfunction - Need Advice

I ate up a couple of distributor gears, both brass and steel. Here is what I discovered. When I flipped the distributor over I noticed the hex recess where the shaft that goes to the oil pump slides into the bottom of the distributor was machined off center. I bought a new distributor and it hasn’t failed for over 15 years. (still using a steel gear with a H roller cam)

It’s kind of an odd situation but easy to double check.
 
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