Maura, I would also recommend benign neglect. I can understand it is difficult for a beginner, but many a times it is wise to leave alone the plants and treat them symptomatically only if it worsens. For eg. in your case unpotting that Paph. and combing it for any signs of disease and insects definitely stressed it more than the real problem itself for sure. Orchids don't like to be disturbed especially at their roots and new growth. Try and be as non-invasive as possible. For eg. if you think they are staying wet to long reduce watering frequency and just mist the foliage and/or move them to a brighter, warmer airy location (or install a fan or two) than unpotting them all.