Your Phalaenopsis (also nicknamed Phal or Moth Orchid) is suffering from what we call "bud blast." Many times an orchid that has partially unopened buds on it will do this when moved from one location to another. Like from the store to your house. The difference in temperature, humidity, etc, from one place to another can cause it.
It can even happen, for example, moving it from a second floor bathroom to your dining room table. It won't hurt the plant. It just won't have quite as many blooms this time. If I have a Phal in my orchid growing space that I want to use in a display in another area of the house, I either move it far in advance of the buds setting on, or wait until all buds have opened.
Welcome to Orchid Board, and that's a really pretty plant.
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