[Joel]

A good number of the objects in your file have accidentally become line labels for the black line, so when you resize the line, they go along for the ride.

Any shape can become a line label simply by dragging it onto the line, which is how this happens by accident.

You can select a line and set it to not allow shapes to become labels in the Connections Inspector, this will not affect labels already on the line.

Hope that helps,