Cosign Notes screen does not have original author of note unless the original author happened to put their name in the note somewhere, which usually doesn't happen unless we have template that puts the attending physician in (which is not always correct, though). The line above the note in the cosign screen could easily contain the author who is requesting the cosignature.
Russ, what is your current cosign process? if the cosigner is signing from the Tasks alert both names should appear as the signature. But if your user is trying to sign it from the notes application they are selecting Edit to open the note (not cosigning it) which is taking ownership of the note and you end up with one signature.