The repeating themes that you are talking about are the overlaps of the continuation of what's taking place.
The sequence is from the day of John the Church Age running it's course to the New Heaven and the New Earth.
It's given in chronological order.
Something else for you to consider, but I may be getting ahead the ball game here, but intend to explain it in a coming thread.
There are 7 dispensations in history, and there are 7 letters to the Churches in Rev.
The 7 letters to the Churches is the 6th dispensation in history.
The 7 letters are the fulfillment of the Church Age in the 6th dispensation of Grace.