From what I've seen, many CPs tend to come back from the roots. One of those things I love about them.
However, I find it very sad and worrying that your original plant died down like that. Can a transplant cause so much damage ? Could it be something else ?
Also I'm wondering if it has something to do with the soil mix. Some mixes tend to be finer and it's hard to seperate the roots (If one wants to seperate, that is), some thin roots break easily and this may be the major reason of the plant's stress. I'm just guessing of course; haven't moved mine yet.