Help! new phalaenopsis doing strange things

[hrothgar]

Always wanted to grow orchids, bought one for my girlfriend for valentines day this year and I'm doing most of the work, what I secretly wanted anyway. . .

So, I picked up a small Phalaenopsis at a local greenhouse, I was told they were well cared for, disease free and probably blooming for the first time.

Everything was great for about two months, I had two flower spikes with lots of healthy blooms.

Then the flowers fell off, I cut the first empty spike about an inch from the base of the plant. Then, as I was about to clip the second spike I noticed new blooms forming, so I let the blooms run their course, but they all wilted and fell off within a few days of opening, the dead blooms had some black discoloration on the back of the petals at the base and tips. I clipped the second spike, also about an inch from the base.

In the mean time, what I thought was a new flower spike has developed into a keiki, I'm told this means my plant is in crisis, and believes its going to die.

Everything was going so well, now I have a suicidal orchid, where did I wrong?

Care was and still is as follows: water about once a week with lukewarm tap water, and leave it in a window with north-eastern exposure with the blinds half drawn.

Leaves are green and show no yellowing, though compared to some I've seen, they seem very dark, one or two look a bit "wrinkled." The keiki looks very healthy though. . .

It’s in a clear plastic pot, and the roots I can see look healthy and are bright green.

There is some white discoloration on the medium (moss), and I had planned to re-pot in a clay "orchid pot" from home depot with a bark mixture. Should I use the clay pot or stick with something clear (I've heard clear is better for the plant)?

What should I do? What’s wrong with my plant?

Any input would be appreciated, I'll try to find a way to post some pictures. Sorry this post is so long, I didn't want to leave anything out.