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True position help

See attached PDF.

I am trying to dimension some true positions. See loc 5 cir 5, has a X reading of .002 and Z reading of -.017. This should give a true position of approx. .034 give or take. Why does the true position come in at .004? I see in the summary that the X deviation matches what I have in the loc. dim., but the Z deviation does not, why is this?

What am I missing here?
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