actually after looking on this pic closely for a while, it seems to me you do AAing and the selout rather random. I mean sometimes you AA the outline, sometimes you use selout without AA.
Also your antialiasing seems pretty jaggy.

This picture shows:
1. Line without AA
2. How it seems to me you would AA it
3. How I would/A common way to AA it with one buffer-shade
4. How I would/A common way to AA it with two buffer-shades