I upgraded soldier max count, but I still only have one soldier. Also, there's no way to turn auto-run off.
Viewing post in My Army Getting Stronger comments
It was the autostart, as someone else said. The only time you can buy more soldiers is between battles. The only time you can turn off autostart is between battles. But battles start automatically, so you'd have to be *fast*. It did eventually turn off when I won the battle, but you really should leave that switch there. And make it so you can buy more soldiers at any time but it only increases the max.