Hi Jooms, from the sound of it, the woody nubs at the tops of the Dends are old inflorescences that were cut back, but I can't be sure. The tops of the canes will also turn woody-looking. They will lose leaves all along the length of a cane when they are preparing to put out new growth. They will also lose them if they're being overwatered. Let the roots dry off before watering them each time.
On the Phals, cut all of the flower spikes (the "stalks") down near the base where they attach to the plant. At this point, you're trying to get the plant to put its energy into new growth, not flowering. Dark spots on the leaves are usually a sign of a bacterial or fungal infection, so you might want to get some plant disease control like Daconil and spray everything down. Don't forget to hit the undersides of the leaves, too.
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