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@Bluah
Your Micke cranks are definitely ISO, which would be part of the reason the Shimano (JIS) bb put the chainline way out.
Given you're running a track frame with (presumably) track cranks, a (presumably) 107mm Miche ISO bb (track standard for Miche track crank/track hub) and a 120mm spaced hub, you shouldn't have anything like the problems you're having, unless the frame/bottom bracket shell or bottom bracket are damaged.
As someone suggested in your original thread, I'd check the frame alignment. I'd also have your bb shell chased and faced before installing a new Miche bottom bracket.