help! My new Phal is wilting :(

[Marisol]

Hello to everyone and thanks for your time.

I am obviously a newbie and so I have no experience with plants, let alone orchids! But i am very excited.

I've had my Phal for about two and a half weeks. It was an impulse buy at the Swap Meet off of an asian lady who hardly spoke English so it was hard for her to communicate the care instructions. But she was kind enough to give me a pack of "vitamins" (it looks like blue sand) for the orchid for free!

My Phal has two spikes in the same pot, is that normal? When i got it, the first spike had nine flowers in full bloom. The second one had three and two buds.

A few days later, the second spike wilted one of its buds until it dropped. The other one bloomed so i thought everything was fine. Yesterday, the new bloom started to shrivel. I checked the roots and they appear to be green. It is packed in moss and it feels damp in the bottom of the pot. The leaves seem to be in good condition, so what's wrong? Please help, i don't want to lose my beautiful Phal