spacing not uniform throughout

[rajaiitp]

I create my 3 column layout using this

mySpacing :: Integer -> l a -> XMonad.Layout.LayoutModifier.ModifiedLayout Spacing l a
mySpacing i = spacingRaw True (Border wid wid wid wid) True (Border wid wid wid wid) True

myLayout = mySpacing wid $avoidStruts $ mkToggle (NBFULL ?? NOBORDERS ?? EOT) myDefaultLayout
where
myDefaultLayout = smartBorders (desktopLayoutModifiers $ getMiddleColumnSaneDefault 1 0 (0.14, 0.43, 0.43))

As the figure shows the spacing between column 2 and 3 is not the same as other gaps. Please let me know how to fix it or if its a bug that needs to be corrected for. Thanks