Can a Phal flower root in water?

[Jinnyorchid]

Hi, All ... I'm new to the forum and a real orchid beginner, although I have managed (more through luck than judgement!) to bring 4 of them back into flower. My favourite pastime is buying half dead orchids (why are they all Phals?) from supermarkets and bringing them back to life. My question, though, is can anyone tell me what I do with what looks to me as though it's a teeny plant starting to grow in water? I cut the last flower off a flowering stem (Phal), cut it off just below a node and then cut the stem back to just above another one. Couldn't bear to throw the flower away so put it in water about a week ago and when I came to change the water today I noticed what looks like growth from the node. Help! If it is likely to grow, what do I do with it? I'm attaching a photo ....
Another silly question ... how come my reflowering orchids grow stems all over the place, whereas the ones on sale have upright, straight stems?
Any, all advice will be more than welcomed!