[Mobhack]

If you are designing a scenario, good practice is that you should save the map off to a file, before placing any units. It is then very easy to design any variant scenarios in the future - simply load the 'virgin' map from file as the first step in designing your variant scenario, before beginning to purchase troops.

Editing an existing scenario from one nation to another using the scenario editor is not a good idea - the HQ units, and thus the default nationalities, will be the same as for the original design. That can cause plenty of subsequent knock-on side effects.

You could try saving your modified map as it is to a map file - that should (I think) save it without any extras. Then start the scenario variant design from scratch using the map alone.

Cheers
Andy