Question about Memento Limited Edition DVD

I recently bought the Memento Limited Edition DVD & when I was watching it I detected what seemed like two layer transitions. The first minor pause was at approximately 1:02:00. I know that was the layer transition because on my DVD player it tells you exactly what layer your DVD is currently reading data from. But then I detected what seemed like a second layer transition at approximately 1:33:53. But my DVD player said that it was still reading from layer two, so it wasnt a second layer transition, but a slight pause, nothing serious. I know that sometimes, not very often, DVDs switch from layer 2 back to layer 1. I tested the DVD with two DVD players in my house and the same exact thing happened at the same place, approximately 1:33:53. I want to know did anyone else detect two slight pauses on the Memento Limited Edition DVD or is my copy defective.