Tool space/overlap setting changing

Hi,
This sping is my first time running AOG, or any gps for that matter, and 2 times this year I had the space/overlap set up but starting a new day I had to change the setting that worked the day to new settings.
One time I changed the W. A. S so I thought that must have had something to do with it but the next time I didn’t change anything. I started the feild and I had to remove the - 15inch space pass to pass to a 0?
When I worked on the W. A. S after I had to change the tool offset but I thought that could have been related.
V 4.3.10
Going to up date now that the pressure is off for planting.