Hi there. First, the salt water flush uses two teaspoons, NOT tablespoons. So I suppose in that regard it'd only be twice the daily allotment if 1 tsp is the recommended amount, about which I know nothing.
However, allotment is a moot point, I think, because in my understanding the approx two teaspoons salt to 32oz (one quart) of water gives the mixture properties that allow it to pass through the body and flushed out instead of being absorbed.
And the not drinking saltwater thing is related to hydration, I believe, and we're using the lemonade and normal water for that.