Very pretty! If my knowledge serves me correctly these flowers are what you consider peloric. Notice how their petals mimic the 'scalloping' of the lip. The lip is after all a modified petal.
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Nice plant!
Oh and I forgot to add that I had a Phal once (and a Catt for that matter) whose new leaf stayed closed like this. After I watered it - and it was exposed to the humidity of the bathroom while watering my collection - the leaf opened. So I would say it's probably a humidity issue...?