I bought several orchids from Carter and Holmes last month, through their mail order catalog. They were having a special on their young plants. I bought the same one you're referring to. C&H has excellent potting medium, their own "recipe". The medium is not old and will likely last until next spring.
I don't know where you live but if you are ever in South Carolina, it's worth the trip to tour their 18 greenhouses in Newberry. I never hesitate to call them if I have a concern about one of their orchids.
I bought 8 in November while visiting and 8 more last month. One phal bit the dust after the holidays because I overwatered.

When in doubt, don't water.
Good luck, it's a beautiful orchid.