Did I miss something - dirt...

[WeirdGuySeattle]

So I purchased an orchid (the Miltonia) in December, and also was given the Burrageara by my orchid society (they are awesome).

But this is pretty strange. They are beautifully grown plants - you can tell they were given great care. But they came in some sort of dirt-like media. It looks like pretty loose -cake like - peat moss with maybe a little perlite in there.

Do I leave these things be? Or repot after flowering? Repot immediately? I really haven't watered these things but once or twice when the dirt looks nearly dry. Its an odd thing - did I miss some potting mix revolution?