Just checked my 28mm v3, close focus alignment is exactly as yours, same distance past 0.7 mtr.
White spots: While my v3 has none, many of my large-format lens show these spots along the area where the black anti-reflective coating
meets the glass, not a problem at all, these areas are outside of the image area. Very common.
Lens separation usually presents as a rainbow-like discoloration in one area, not as spots as you are seeing.