[Brian]

Sorry for the confusion, Brianh! We've got a feature request open on the ability to constrain a stroke to the interior of the shape, but the current version of the app centers the stroke on the bounds. A stroke will be half "inside" and half "outside" the shape, in other words.

The app was originally aimed more at print output than pixel-perfect on-screen drawing, but we understand that a fair number of folks would like to use it this way; we're keeping that in mind as we work on the app.