If it was me, Id take the clear pot out of the decorative one. Quite a few of us have noticed that phal roots love to have light on them and will actively seek it out and a clear pot allows that.
The splitting of the leaf means its not getting enough water or there isnt enough humidity in the growing area. As long as it continues to grow I wouldnt worry too much.
I'd probably move it a tad closer to the east light source as its going through its growing phase right now so it needs the extra light to convert it into energy. Phals can tolerate east facing light far better than west. In fact, most people here grow their phals in an east facing window just because of that.
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