Originally Posted by Goldorak

Ah. This one is tough !
What we see here is the configuration "quick change". You are likely traveling this summer ? You are on a 772 equipped with the new BEST seats. AF had a crazy idea which is to remove some row of J seats during the period of summer holidays when J cabins are less filled, to replace them by Y seats all sold as seat plus. This results in a crazy config with J, then Y, then W and then again Y.
More info about Quick Change here :
http://www.flyertalk.com/forum/air-f...il-2015-a.html

The picture of the seat map you included in your post is the 1st one we see here on this forum. So thank you for having share it with us ^
I have to say that I had hesitations. I mean, reading your post, I immediately thought about Quick Change, but I was wondering "where is the W cabin ?" So I checked the regular config on AF site and W is from row 19 to 21. And we don't see these rows on your seat map because it's a different cabin.

PS : LAX is supposed to receive this config from July 6 on AF072/069, so it seems they are on schedule ;-)