Thank you for replying. I was worried my questions would be overlooked due to the direction this thread ended up going today.
Our application, both my spouse and I, were included from the beginning, and only the principal applicant received the PPR email. And so, with your answer to my question, it sounds like we will only get one since nothing changed from the start. I was just worried as the PPR email, Ready for Visa, only lists the UCI number for the principal applicant, not the dependent. The email does sound like we are to mail in the primary applicant and any dependents' passport/passport photocopies together, along with Annex A (inland applicant). I just noticed Annex A only lists principal applicant info, not any others.
And for second question, yes, I am from a visa-exempt country, so figured only a photocopy is required, not the original. My spouse will have to mail the original since they are from a visa-required country.