In PLAXIS 2D AE, when drawing a userwaterlevel in Water conditions mode, only for the first point the Snap to grid setting is taken into account correctly. For all other points while drawing the water level with the mouse, the program will snap these points to the grid regardless of the Snap to grid setting.
This issue is now solved since PLAXIS 2D 2015.00: now for all points of the waterlevel the Snap to grid setting is properly taken into account.
In PLAXIS 2D AE, please use the command line to set the correct location.