Looking carefully at both of the pics you posted, I think you have an advantage in that the stem seems to be growing pretty straight. It ends up leaning in the pot because of the sheer weight of the plant and the looseness of the large bark media.
I think there's a good chance of being able to straighten it up by repositioning it when you repot (which you said you have done in the past), but this time, use some combination of stakes, wires, and/or the post you talked about to anchor it more securely.
It looks like a very healthy plant, with six or seven leaves on each side. Just curious, I can see a tag in the pic. What Phal. species or hybrid is it?
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Cheri
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