Grid Settings Change with Limits

#1
Whenever I change the limits of a drawing, the grid settings change as well. Currently, I am working on a drawing with limits ranging from 0 to 12000 for both x and y directions. The grid spacing is 120 no matter what I specify in the drawing settings. Surprisingly, the snap spacing adheres to the numbers I define in the settings. Could someone shed some light into this issue?

Thank You,

Andreas
cron