I am having one of these problems. The original drawing has the 0,0 set correctly, then when I xref it in at 0,0, it inserts somewhere else. The above didn't work.
For these types of issues always check your drawing units and see what your drawings are set to. You need to know if you are going from inches to feet, meter to feet and so on and son. Then adjust accordingly when trying to merge drawings.
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