Perhaps if you explain how Matt. 24:29-31 was fulfilled in the destruction of Jerusalem in 70 AD, I could understand where you are coming from.
I am not a great Biblical scholar, but from what I have read, these verses deal with the idea that the Lord is orchestrating the events surrounding the destruction of Jerusalem in A.D. 70. Verse 29 especially seems to be very symbolic. The bottom line is that the two sections of Matthew 24 are clearly talking about two separate events.