Recommended parameters / what kind of driving style log would work best?

So I used this maf cal for my jbr powerpath stage 1 / corksport aluminum turbo inlet and my ltft and stft are within +- 2% which I'm thrilled about while driving but my problem is when I get off the gas pedal and coast / sitting idle my ltft goes up to 14% . My car idles at 1.13-1.16 maf volts. Shou...