IOS – Two Clash of Clan accounts under one Game Center account

I have a problem that I am worried about with my Clash of Clans game. I originally started playing the game on my iPad. I was not able to play it while I was out because my iPad did not have an internet connection. So I downloaded the game on my iPhone 5 so I could play it everywhere and started a new base. At the time, I did not know that they were on the same Game Center account. Now every time I get onto my phone, it asks if I would like to load my TH 7 village, but my progress on this base will be lost. Well my base on my iPhone is a lot higher then the one on my iPad now. If I have to lose one account, I am OK with losing the one on my iPad lvl 47 rather than my lvl 70 on my iPhone. Can someone explain to me what I need to do to save my lvl 70 account?

I am OK right now but when i get a new phone I will lose it because it is not linked to a Game Center account anymore. How can I ditch the level 47 village and keep the level 70 village?

Long story short: I have Clash of Clans on my iPhone and on my iPad. Both have different villages. Started my village on the iPad first. Both are under the same Game Center account. Everytime I get onto my phone it ask if i want to load my TH 7 King Tom village. I always say no because it is not high lvl like on my phone. Is there a way to keep both villages and put one under a different game center or can I delete the low level one and just leave the high level one? Just dont want to lose my lvl 70 village is all because I have put so much money into it.

Thanks