Correct, every share sold is a share bought. The buy/sell ratio is just tracking the way the transactions take place.
Example, you're buying and I'm selling. If you place a 10k buy order at .21 and then I sell 10k at .21 it's logged as 10k shares sold. But if I first place the 10k sell order at .21 and then you place your 10k buy order after me at .21 it's logged as 10k shares bought.
If you placed a buy order for 20 million shares at $1 it would sit there until 20 million shares were "sold" to you and would be logged as 20 mil shares sold even though the buy order was place for 5x our current price. That's why the price the shares are traded at is more important than the way the transactions took place.
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