I have learned the basic strategy. I would think that basic strategy is an assumption that the count = 0. But now learning the indices I find that some basic strategy plays aren't made until a certain + count.
For example (1d, NDAS): BS for my 8 vs dealer 5 or 6 says Double. But when counting the index number says I hit on a neutral count and only double once I'm at a +3 count. Likewise with some soft hands like my A,3 vs dealer 4 - BS says double, but index says you hit when count = 0 (double at +2).
Can anyone offer an explanation to help me further understand why this is?

