I was chatting with a friend who takes issue with the way we speak of "call" inside of the Lutheran Church, particularly in the Synod. He pointed out that the usual word in the NT is "sent" not "called." But I think much is clarified if we consider that the word "call" in this instance should be understood out from Matthew 10:1 and Mark 3:13,14.
Our Lord CALLS the twelve to Him (Mark adds the all important "that they might be with Him") so that He can send them out to preach. The calling of Christ precedes the sending. He calls a man to first of all BE WITH HIM; to spend time with Him in His Word and in prayer, and these are the ones He sends.
When speaking of a congregation's relationship to one of these called and sent servants, I think it's best expressed this way:
Pastors are called BY Christ THROUGH some agency of men (in our case, the congregation*) to do the tasks Christ sends them to do in that arena as servants of the people of God in that place and they are to be readied for this task by continually "being with" Him.
* Note also Didache 15: "Therefore, appoint for yourselves bishops and deacons worthy of the Lord, men meek, and not lovers of money, 1 Timothy 3:4 and truthful and proven; for they also render to you the service of prophets and teachers."