Because I am able to compartmentalize issues...
Try reading the first four posts in the following thread. Reference is made to an adjustment screw that sits higher than the others. If I recall correctly, that is the vertical alignment screw. Note that it's very easy to adjust either the vertical or horizontal alignment while throwing off the opposite alignment. A fair amount of delicate trial-and-error is required to get them both right at the same time.
I adjusted my standard GF670 to be correct in both axes at the beginning of last summer. With light normal use it is now slightly off vertically, but still dead-on horizontally (where it counts).
Fuji GF670 focus issue