Uneven Sideburns

I think the mirror is broke in our bathroom.

I have been having trouble getting my sideburns even when I shave in the morning. I typically notice they’re out of sync in the car as we drive off. I hope that I’m the only one taking note. But I can’t figure it out! In the bathroom mirror they look fine. In the car mirror, they’re askew. I don’t know what to do (don’t suggest cutting them off!).