I've follow this tutorial
https://forum.pfsense.org/index.php?topic=63531.msg364520#msg364520
And now when I download from 2 differents PC they got each one half bandwidth, the same for more PC. Getting close to resolve the problem!
Still can't figure out why the traffic shapping give the same speed even if one queue is 1% share and the other one 61%.
PS: I've got the last build:
2.1.5-RELEASE (amd64)
built on Mon Aug 25 07:44:45 EDT 2014
FreeBSD 8.3-RELEASE-p16