I noticed there is a bug in ISOBUSTER when getting layer break, it subtracts 1. You can obtain the layer break info using Isobuster which gives the correct results if you add 1 to it. Reading the GEAR and some other info's on which sector should be the layer break, it is defined as the first sector of layer 1 (where layers are 0 and 1).
Just right click on the top most entry in the tree on the left (DVD), and select properties, on the 2nd tab the layer break info is given, add 1 to it to get the correct layer break info...
Did some research, fixed