I think that was very interesting about the 2 raptures.My take is that there will be a rapture of the "church" which is the mystery rapture Paul talks about.
1Corinthians 15:51 Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed,
1Corinthians 15:52 In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed.
 
AND a rapture of the Tribulation saints which John talks about
Revelation 20:4 And I saw thrones, and they sat upon them, and judgment was given unto them: and I saw the souls of them that were beheaded for the witness of Jesus, and for the word of God, and which had not worshipped the beast, neither his image, neither had received his mark upon their foreheads, or in their hands; and they lived and reigned with Christ a thousand years.
Revelation 20:5 But the rest of the dead lived not again until the thousand years were finished. This is the first resurrection.
Revelation 20:6 Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and shall reign with him a thousand years.
 
This "resurrection" only mention the ones who were beheaded and not received the mark of the beast during the tribulation.
 
In Acts where Peter was declaring we or should I say they were living in the last days where the son's and daughters will prophecy...I believe he and the apostles could have been except for the fact that the nation Israel "rejected" Jesus and blinders are now on that nation as a whole. Paul was called to be our Apostle and the dreams and visions were complete upon the completion of the Word of God.
 
If you read through the episles of Paul he makes it very clear he is our Apostle and the Jews have been blinded.
 
So yes I can see two raptures. Peter did not even know about the rapture of the "Church" when he preached in Acts. It was revealed to Paul by God. It was not revealed to the other apostles. They were looking for the resurrection after the tribulation.
 
thanks
Mike W