QTR-Quadtone RIP

I just bought an R2400 and am doing my first Linearization with QTR. I
printed the Ink calibration page and was surprised to see the 8th ink
position (Light Light Black - Flush cartridge) printed as well. I had
selected the QTRr2400-K7 and assumed QTR would know that this position
does not have ink. Is this normal? I'm concerned that once I start
printing this eighth position is going to be firing.