Car seat help!

I’m not sure where else to post this.

FTM and installed the car seat base in my car. I have the Chicco Fit2. I’ve noticed that the bubble level indicator changes depending on where I’m parked/driving. The bubble is actually way off to one side (but still barely in the level lines) parked in my garage. On some roads it’s not level at all. Some parking lots it’s perfectly level. What can I do to make it so it’s level all the time? Or is it not as big of a deal as long as it’s close?