I think what you have is a basal keiki. Phal's will do this from time to time instead of a keiki off of a spike. You can safely seperate it when the roots are an inch or 2 long. I had a phal that I almost killed from crown rot, when I first started growing, and it put out a basal keiki and the keiki spiked before I had a chance to seperate it from the mother plant!
Looks like you have 2 nice new plants now!