Links in pages of "Mapped Domain" point to incorrect sibling "Mapped Domain"

I've added some mapped domains so that I now have:

My problem:
The links (like the "Hello World" for instance) inside the mapped domains all point to the Toyota domain. Except for the vanilla, which correctly points to itself.

It's strange because its not the first alphabetically, not is it the first one I've added. I also don' t think it the first one to be resolved via DNS. So not sure why its picking the toyota.

How I get the link to "Hello World" in the Nissan version of the site to point to: ?

Any help would be greatly appreciated!