The shift click export feature makes some assumptions for you when assigning LUN IDs as you can see here. The GUI autopicks the fist available LUN ID for the host, which you can edit in one of the prior screens, but you only get to pick 1 LUN ID presumably assigned to the first LUN in the list and the rest get auto assigned sequential numbers.
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File comment: Screenshot
Shift_click_export1.GIF [ 23.83 KiB | Viewed 23764 times ]
Hopefully a future version will allow assigning the LUN id to each VV manually.