A known trait of the clones
More of a trait of poor tolerances, which doesn't just happen to clones. Granted it's more likely with a clone and the scale of manufacturing they go through but I've had authentic USA made
rda's with the negative post pulled out and the clone(s) I own of the same RDA have not.
I ended up slightly denting the area around the press-fit hole with a center punch four times to slightly reduce the diameter of the top of the hole, then re-pressed the negative posts back in to the deck, and they have been fine since then.