Sorry to be so late to the party, but....

Just to clarify and add my 2 cents, this definately sounds like a Vue issue.  Keep in mind that .obj files don't contain any 'pivot' (or axis) info at all - just the vertex coordinates.  So if you export a Cube primitive, you can just bring the .obj file into a text editor and see the vertex locations.  If you didn't move the cube around or resize it before export, then the 8 vertices are likely:

-0.5  -0.5 -0.5
-0.5  -0.5  0.5
-0.5   0.5 0.5
-0.5 0.5 -0.5

0.5  -0.5 -0.5
0.5  -0.5  0.5
0.5 0.5 -0.5
0.5   0.5 0.5

...(though the order they are listed may be different).  In other words, these vertices would all be + or - 0.5 around the 0/0/0 world origin (unless you scale up or down when exporting, but they'd still be centered).
 
So, if Vue is placing the 'pivot' point of the object at somewhere other than the center of the 8 vertices (or explicitely at the world origin), then... well, there's nothing in the .obj file telling it to do that.

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