I need to make several diagrams with many precisely-size, consecutive, bordered boxes. I'm snapping all the edges of my boxes, but box strokes are inlaid; it looks like snapping the edge to the grid determines the maximum extent of the box. The side-effect is that when I put boxes next to one another on the grid borders appear doubled.
Here's an example of what I'm talking about:

What's the best work-around for this? I've come up with a few ways to cope, but most of them involve making bizarre sized boxes that are hard to color fill.

