According to Sheldon Brown http://www.sheldonbrown.com/chainline.html, a double crankset should have a chainline 43.5 mm from the centerline of the bike. You could try measuring yours, from the outside of the down tube plus 1/2 the diameter of the down tube.
From the photo it appears that you have an outboard bearing bottom bracket. I did not know that you could use a BB spacer with that type. Since you already have I suppose you could try moving the spindle out with an additional spacer. But see how it measures first. Or quit worrying and go enjoy your bike.