Questions about SBS Linear Progression and Excel

Ok so Hello to all,

Im not absolutely new to lifting, lifted ten years ago and want to start all over and got informations about the program on a german sub.

After fiddling arounf with the excel sheet i have 2 questions.

For example if I use Squat as a Mainlift and also in the variations tab why is there one day with a Squat (Mainlift) 87.5x3x3 and another day (as variation) with 75x8x3.

I thought the intensity of the mainlift should higher than for the variation but not for me, why?

Second question, when i change the intensity for Main lift or variations i always get the error #WERT in my plan?

So i hope you can help