I will try that and see what happens.
This is where this sticky is going to be good because I used Michael Vone's book and the problem existed but now I have been given the help to solve the problem.
While we are waiting for others here is another one for the brain to work on, I think it is to do with the Great White Void.
In Michael's book on page 29 & 30 it goes into merging multiple regions and it explains how to do it.
It said that this is easily done in the RGE. First you create the tiles that exist in one region, just as described above (as normal) until and including the step that tells you to Toggle Populated State. Then you go back to an earlier map that shows the missing region (or regions), and zoom into the next region, likewise creating tiles in that region. Repeat this again if you need a third region, etc. Now you can click Edit, then click Minimize quad-tree, and continue as before.
I found that if I did as it said I would end up with either the tile of one region or the tiles of the other region but not both.
So if this is the case and it is that easy to cross the great white void then why didn't Russell use it in the building of The Great Southern Rail and Allan use it in the Adelaide and the Hills?