Can't quite understand what you mean. Is this something that's just happened now you've changed the bulbs?
Are we talking main beams or dipped beams (inner or outer lights)?
It's quite common to push one of the headlamp adjusters out of its ball cup on the light when changing bulbs.
Do you have projector dipped beams, and if they are, smileys or non smileys? The smileys replaced the non smileys to cure a darkish area here.