I have been using VW (11.5.1) for about a year, and have always had a problem with objects not snapping to grid correctly. I use 1/2" grid, with 1/8" resolution, fractions only, no decimal. Objects often wind up slightly off-grid (several pixels), sometimes when generated, sometimes when duplicated, and maybe even when moved. No combination of the Snap-To choices seems to prevent the problem. The off-grid objects usually snap to grid if I invoke the Snap-To-Grid command, but sometimes they don't. Then I have to re-enter the size (exactly as it already exists) in the Object Info box, followed by invoking Snap-To-Grid. One thing I discovered is that grid snapping seems to work much better if I blow up the drawing until the 1/2" grid actually shows.
I waste a lot of time getting everything snapped to grid correctly, and would appreciate any comments about how to avoid the problem in the first place.