| Like pretty much all of us have to do as we go, it sounds like you are learning what kind of mix gives the best results given your watering habits and your conditions (temps humidity, etc., etc.).
As an aside, a funny thing about our habits, in my experience I have noticed folks are much more willing to change the mix that they grow an orchid in than it than they are to change their watering habits or their conditions unless they have a greenhouse). In the home growing conditions are sometimes hard to change, understandably but of those things that we can change, our habits, or the potting mix, many growers are much more connected to their habits.
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