Inline parts with 2 or more connections are using the Arrive and Leave attributes to relate the main flow (design) direction to the connection points on the shape. When a shape is created using MS Visio tools and subsequently added to a stencil using the Import Shape Wizard, it is important that the connection points are added in the correct sequence. The point added first will by default be related to Arrive, and the second will be related to Leave. This can be seen as the default value of Arrive is 1 (referring to the first point) and Leave is 2 (referring to the second point).