I'm working with some Bills of Materials and am identifying the weldments with balloons. I've found the numbers to become unreliable if a jog point is added to the arrow line. Until now I've been grilled for this as an over sight. It's a big bug at our office. Go ahead and try it yourself. I found everything seems right until you re-position the arrow head or dot to a slightly different placement on the weldments piece.
-Mac
SolidworksDrawings And Detailing