Brushes Drawing Perpendicular Lines? All sculpting brushes draw two straight lines and out come two lines, each with an accompnaying perpendicular line. Any idea what's going on here? 

Edit: I should also mention that it only happens in this singular location. No where else really. So I don't think it could be an issue with the axis.
Strongly suspect symmetry across x or y axis is engaged Martin! Many fun parameters located at bottom of 'Tools' tab of toolbox (shortcut T, or can be pulled out from tiny "+" at left edge of main 3d viewport).  :-)