I can't answer if the bees move winter stores around, but I know my bees move spring stores around. Whenever I feed my colonies I put coloring in the sugar water. I have pictures of colored sugar water being moved into honey supers in June after all feeding has stopped about 4 weeks before supers went on. I use a lot of foundationless frames and would see a handful of cells with green liquid in them as the bees were building comb in the supers. So in my experience, my bees in my apiaries under my management do move spring stores around as needed and I don't know how often it happens.
Marcin
Chicago
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