The warning triggers when you approach the line, not when you cross the line. That seems logical, but it was calibrated in a way that it started even if I moved

The warning triggers when you approach the line, not when you cross the line. That seems logical, but it was calibrated in a way that it started even if I moved a little to the left so I could use the rear-view mirror, as usual when I have a truck behind me. Other times it started even driving totally centered in the lane, why? Irregularities in the road surface or temporary lines that someone painted during works and nobody deleted properly. The alerts were dangerous because, if I'm already paying attention, I now get the idea that there's some danger elsewhere so I just start to nervously look in all directions, before reaching the conclusion that the system is incorrectly second guessing me.