I am veryy confused! I thought the backkcounting approach would be far more powerful than playing at a disadvantage! Why is it on CVCX when you dont backcount and instead play at TC0 the win rate is higher! than if you just backcount and play hands only at +1 or higher!?

In summary, why is win rate more higher when you play all TC's such as -1 and 0 +1, +2, etc than if you just play positive counts!? Why would playing at a disadvantage result in higher win rate!?!? Wouldnt playing at just positive counts and at an advantage result in higher win rate? I am confused!

Please reply, thanks!