So much of this is essentially meaningless. The Reformation was a big step forward for Christ's church, but to get hung up on nuances of interpretation from that period of time, to the point where it affects how you look at other people and the sincerity of their faith is counterproductive to the mission and purpose of the church. Once individual identities get wrapped up in attempting to fill in the gaps in security in their own faith, fellowship gets broken when it shouldn't.
So, Jack, are you willing to accept known error into your church for the sake of "unity" or the supposed "mission and purpose of the church"?