A footnote, going all the way back to initial premise:

"I'm currently in Brazil so I don't have access to my scope or analyzer
so I can't verify if I'm actually getting more pulses than I should..."

But you did have a microprocessor, already wired to the encoder.  What I
would have done was to write a quick and dirty logging program, thus
creating the missing "analyzer". It would only have had to be good enough to
answer the question of what the encoder hardware was supplying.

Barry
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