No it's not the reason because I have a 2nd character, a war lvl 80 with 3k3 gs, when I bg with this character I get in the low bg bracket but if I switch to my hunter I get in the high lvl bracket ...
So there is enough players to full a bg with my war and not my hunter ? ...
Also when I q with my war I wait 2mins- 4 mins to get a bg . but when I q with my hunter I wait less than 1 min but get in High lvl bracket ...
It means from the start, with my hunter, I'm in queu for high lvl bracket .
Well, the algorithm which determines to which bracket you should've be putted in is a little more complicated than just checking your average item lvl. Maybe you did something that the algorithm recognized as "trying to twink in low gs bracket", but since you didn't try to do that, that's probably a bug of some sort. Try contacting a GM with this matter.
If you have gear that is not currently obtainable on Frostmourne (equipment + inventory + bank), you will get bumped up to the higher BG bracket. The BG bracket system has been broken ever since the launch of Frostmourne.