940px
60px
860px
140px
780px
220px
700px
300px
620px
380px
540px
460px
460px
60px
60px
60px
60px
60px
60px
60px
60px
60px
60px
60px
60px
two outer: div class="grid_6 push_6" <=sibling=> div class="grid_6 pull_6"
===>Fixed it!!!<===
60 px, class = "grid_6 push_6" => class = "grid_2 alpha"
380px, class="grid_6 push_6" => class="grid_10 omega"
Pay attention at the gap between 2 rows!
220 px, class="grid_6 push_6" => class="grid_6 alpha"
220 px, class="grid_6 push_6" => class="grid_6 omega"
220 px, class="grid_6 pull_6" => class="grid_6 alpha"
220 px, class="grid_6 pull_6" => class="grid_6 omega"
60 px, class = "grid_6 pull_6" => class = "grid_2 alpha"
380px, class="grid_6 pull_6" => class="grid_10 omega"