They were not allowed to do so. I witnessed a fellow voter telling the worker that no vote was cast on page 2, response was that both ballots must be deposited.
Where was that at?
See, I would never even THINK of doing anything with the ballots except vote on them and then put them in the sleeve as instructed. That’s why it didn’t even occur to me that somebody would submit half a ballot. But unless that’s what happened 300+ times these numbers don’t add up.