When I use blockchain.info tools or bitcointoolkit.info tools
to convert an address, such as 1MCNpVGDY7BGjJyWZL5FJZiaVkQEiuxy8H to a hash 160 public key : I get dd894dfc0f473c44cc983b5dd462bc1b393f7498
However, if i convert 3MtPk2kf61VepUfwgRjqjC5WeGgxE4rRPS i get the SAME 160 hash address ie dd894dfc0f473c44cc983b5dd462bc1b393f7498
I am baffled by this. I thought a hash 160 should UNIQUELY convert between it and the Address and back ???
I also found other address that convert back fro hash160 to the wrong address....
thanks for any clarification.....