Two weeks is nowhere near long enough to keep in QT. I'd suggest 8 weeks minimum; many parasites take much longer than 1-2 weeks to appear. Shy fish, like your CBB, really need the QT time, not just for parasites, but to start feeding and adapting without all the competition.
Ich isn't fuzzy and one spot may just be lympho or a fungal infection (rare in fish). Lympho comes in all sizes and, while not really fuzzy, is lumpy---sort of like small cottage cheese or miniature cauliflower. It isn't dangerous and will go away with good water, food, and time. If spots start to multiply; that would be another thing. IMO, ich treatment needs to be done in a QT and the DT left fishless for 9 weeks; but cross that bridge if you come to it. Please use a proper QT regimen from now on, or you will have a parasite problem sooner or later.