@raphjd
I think the term "Voter" is what is confusing you here, since the word is both a noun and a verb. Let's make it simpler.
A person who was a voter while they were alive, but then died, well they don't vote anymore. But if they did, that would make them a "Dead Voter". So for that definition to be accurate, the Voter has to have voted while they were dead. That would make them a dead voter.
Someone who is dead, and still has an open registration -- is not really a dead voter according to the definition above. They would be more accurately described as a Dead Registrant.
So when you say "Dead Voter" and the report talks about "Deceased Voter Registrations" you're not really on the same page. But you knew that already. You're a smart person, and you know exactly what the distinction is I'm talking about here. It's a distinction that your headline hyperbole glosses over.