Doug,

A problem exists with what you just stated. Go back and look at Matthew 28:16-18.

In this area of the Christian text, it states that the eleven disciples went to Galilee and to the mountain where their leader, Jesus, had told them to go. Now, it says that when they--referring to the eleven--saw him, they worshipped him. However, noticed that it says that some doubted.
No where in this area does it say that more than the eleven went to the mountain--only the eleven disciples went. Also note that not all of them 100% believed according to Matthew.

Which one has more authority to you Matthew or Acts?
Matthew is assumed to have been written around 60 to 65 C.E. Also it is reported as being written by Matthew Levi.
Acts is assumed to have been written around 63-70 C.E.
And the reported author is Luke.

Also look at Mark 16:19-20. It says that the disciples then went out and preached everywhere. Notice that the meeting in Acts that you have mentioned to us is not discussed. According to Acts, the disciples were supposed to stay in Jerusalem. Mark is reported to have been written around 55 65 C.E.

Now, also look at Luke, which Acts is suppose to be a sequel to.
What does it say in Luke 24:51?
Jesus left them, didn't he?
Go back to the previous text in this chapter. Does the recorded teaching line up with the recorded teaching in Acts 1:4-5? It doesn't, right? The author is the same for both texts, right? How come the two teachings are not the same?
Was Luke a disciple?
How did Luke know all of this? Wasn't he a friend of Paul's {as recorded by Christians}?

Shalom,
Gretta