Apologies if I am mis-reading this - highly likely TBH, but just in case, with a metalastic bush, the inner sleeve of the bush MUST be clamped solid in the suspension bracket and the outer sleeve MUST be a tight fit in the wishbone loop. All the compliance in the suspension is provided by the rubber of the bush, allowing the inner and outer sleeves to move relative to one another. If the bolt is letting the inner sleeve move, it will wear through the suspension bracket.
A poly bush and nylon bush setup will have a loose inner sleeve, but that too needs to be solidly clamped to the suspension bracket for the same reason. With these, the suspension movement is allowed by the inner sleeve moving within the poly or nylon bush.
again, apologies if I misinterpreted what you said, don’t mean to be all preachy