Area Takeoff for Rebar Estimation

Quick question for zztakeoff users: I'm noticing it gives me about 10% more rebar quantity than Plan Swift for slab takeoffs.

In Plan Swift, I use the grid tool (X & Y lines) + a splice formula, so the weight is based on the actual layout. zztakeoff seems to just use a continuation factor/multiplier, which pads the numbers. I know it's fine for rough estimates, but for the sake of accuracy, does anyone know how to make zztakeoff calculate based on the actual grid rather than just a factor?