If I have my D7000 SD card slots as over-flow, the max shot count remains the same whether I have just slot 1 with a card in it or have a card in slot 2 as well. E.g. 16GB SD card in slot 1, RAW quality, max shots 461. Add an 8GB card to slot 2, and max shot count still says 461 (where I would expect it to say 690 odd!). Am I missing something blindingly obvious here?