horcrux = cloning?

[Fabian Peng Krrholm]

No: HPFGUIDX 138459

Hi,
I was thinking the other day when reading a post about the horcrux 
diary Tom Riddle created. As I understood it, Voldemort could come back from someone writing in the diary, living on their feelings and finally come back to life to the cost of the life of the writer. Now, what if this happened after the end of book 4? Would there be two Voldemorts? 

Just a thought.

/Fabian