Graphic Line Will NOT Align to Grid
 

A graphic line will not align to two points on the same grid line, either
vertically or horizontally. If one end is on the grid, the other end dances
on either side of the same grid line, about 1/5 of a grid dimension on either
side of the grid line. So all vertical lines, say, are slanted.
Both Snap-Tos are off (though it acts the same way when they are on).
Is this a 2007 bug or is there some option buried in a ribbon somewhere?