Somehow I have created a cloned army when moving out of my city. I'm not exactly sure how this happened. All I know is this storm dragon army attacked my town. Verga died in the battle, but I still came out victorious. He contracted Typhoid Fever so I selected him and moved him out of the city. When I did this, all the troops in the city came out as well, which was weird because I only selected verga. I went to move them back into the city and they wouldn't go. So I clicked on the city, and all the troops were still in the city as well. So somehow I had created a cloned army.
I have the two saved games before the battle and the next turn with the cloned army. You can see it is cloned because I have two fire elementals, but in my enchantments there is only 1.
Before the battle:
https://www.dropbox.com/s/62v20q387qkekrb/beforearmysplit.EleSav
And After:
https://www.dropbox.com/s/ctn8n4cjegrmqcv/splitarmy.EleSav