If I understand the county atty's point correctly, he is not saying 203.725 doesn't apply, it's a question of when; pre-signature gathering or sometime after.  ORS 203.725(2) requires that 2 or more amendments to the county charter be voted on separately.  Seems the county could set up a vote on each amendment separately even though the petitions aren't set up that way.  Or barring that, the county could determine that the measures don't comply with the statute and could reject it.