Isn't it obvious? That's the way the game was designed. Having multiple maxed out Nobunagas would be too powerful since one that is maxed out has 26,000 health. If you could summon more than one of everything, then you could do something like summon an army of Rocky T'man which will destroy everything since you can't kill a Rocky T'man.
Actually there is a trick to summon more than one of anything. All you have to do is:
1) Open the game
2) Double tap home bottun on iphone
3) Swipe Upwards
4)Hold down power button untill screen saying 'slide to power off' shows up
and finally step 5 is to slide where it says to. Voila magic will happen right before your eyes
Comments
1) Open the game
2) Double tap home bottun on iphone
3) Swipe Upwards
4)Hold down power button untill screen saying 'slide to power off' shows up
and finally step 5 is to slide where it says to. Voila magic will happen right before your eyes