I spent all last night translating legal BS. I think that when one is approved as a sponsor, which has no financial requirement, they never consider or pass onto the applicant's visa office any of that information. We only included my wife's financial info in her sponsorship application. I submitted all of mine as required with my application.
Even if someone is approved as a sponsor, the visa officer reserves the right to request proof that the sponsor has ability, willingness and intent to actually support themselves and their spouse and dependants. I'm thinking this officer just has no clue what we're planning to do once I'm there. If he or she had all my wife's info, he or she would already have her tax info, pay stubs, NOA, etc.
SO...we're going to send all of that again, with mine, and letters of intent, job offers, whatever we can. I think all they want is to see we HAVE a plan and safety net. I don't think they would ask for the passport copy if they intended to still deny me once we send proof. Though it is all very weird.
I saw that someone else recently was asked to prove this same thing, but received the official PPR (asking for a scanned image or copy). Maybe this officer just does it this way?
WHO KNOWS. I never get the normal version of anything. It's probably just me.