Any ideas on why this AD didn't die?
So after attacking a base with level 5 AD's using 3 level 4 lightning spells to take take out one of the level 5 AD's, I then decided to go for another dragon attack using the same strategy with 3 level 4 lightning spells to take out one of the level 5 AD's. Upon placing all 3 I noticed the AD was still there, now mind you I did not miss the AD at all in fact they were placed almost in the same identical spot as the ones on the AD from the previous raid.
Pics:
1st spell
http://i.imgur.com/hgUqIWi.jpg
2nd spell
http://i.imgur.com/OGuswKQ.jpg
3rd spell
http://i.imgur.com/qmvvicR.jpg
Aftermath
http://i.imgur.com/YEWw9Ty.jpg