Help for my daughter's mini Phal?

[RandomGemini]

This poor guy can't win for losing! Relocated to my office window due to being under watered. Recently reported in bark after the spike dried up and dehydrated.

It has new leaf and root growth... And I took it down for watering today and found this:



What's going on with it? The white spot under the new leaf is old. I figured I would just leave the leaf until the plant dropped it on it's own. The yellowing at the edge of the other leaf is new in the last week and so is the blackish purply mark.

It's swimming in water in the pic, because I am watering it right now. It is not usually left like that.

Thanks!


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