If I am reading this correctly..you mean that there was too much tension in the chains??
This is when chain tensioners come in. Make the chain the next smallest size and add a chain tensioner.
You can use this:
http://www.andymark.com/product-p/am-0286.htm
Or for a more DIY approach: Cut a 1 1/2" long, 1/2" PVC down the middle of the circle. Make notches for zip ties with a file. The attach it to the chain.