rear wheel and chain adjustment query

[MC680x0]

No matter what I do , and how I do it, with  the calliper torque bar loosened and the rear axle nut just biting , and adjustment of each of the chain adjustment nuts - I cannot get the rear wheel markers to align. Everything lines up on each side of the swingarm but after  I torque up the axle nut, the l/h marker is just before the 3rd major mark (mark cannot be seen) and the r/h is just after the 3rd mark (mark can be seen). I' say there is about 2mm difference between the two

Tried 5 times , and yes the adjuster nuts are torqed up as it calliper nut, before I torque up the axle nut.

Is this slight discrepancy  ok or do the adjuster marks need to be bang on each side - mm perfect.