Don't sweat the small stuff. The days of that standard of quality control has been gone for years. The stuff is made in China on an assembly line and sells for less than $300 apiece. As long as it doesn't effect playback then it doesn't really matter IMO. If you want perfection then you have to pay a LOT more for it than what you have paid. Maybe Audio note would work. They hand craft everything. Here
Audio Note UK AN-E/SPx AlNiCo Loudspeakers Review - Dagogo
Audio Note UK AN-E/SPx AlNiCo Loudspeakers Review - Dagogo