Nop, normally it's a unique clone. I bought it in june 08, with two shoots. The oldest one started a spike a few weeks later but the bud blasted in october 08.
Soon I had many new shoots (I have counted 8 today) starting from these two old ones but the second oldest shoot took one more year to start a bud. It is this flower.
So they should all be the same plant, unless the two original shoots were two different plants. Which I don't know