Feedback Linear Limit on Configurable Joint

The manual seems a little unclear on how linear limits on configurable joints work when there are multiple limited axes. The description of linear limit, "You can limit translational movement using the Linear Limit property, which defines the maximum distance the joint can move from its point of origin (measured along each axis separately)" implies that a linear limit on multiple axes will create a cube-shaped constraint area. The actual constraint area, as near as I can tell from a brief experiment, is a sphere around the origin. This is doubly unclear as the example only shows limiting movement on one axis at a time. A clearer explanation that this is a total distance constraint and an example with linear movement limited on multiple axes would save a lot of potential headache.