Junkboxes not giving proper loot?

Maybe it's working as intended, but it seems the heavy junkboxes are giving the exact same loot as the ones i can get from Lev 6 mobs outside Stormwind. Pocket watches? Rogue diaries? According to http://db.vanillagaming.org/ a Heavy Junkbox should have a 43% chance to contain (1-8) blinding powder. After opening a dozen or so, I said screw it.. getting the same contents from these as i do from looting lv6 mobs? The risk in pick pocketing higher level mobs is greater, so the rewards should be greater as well.
Everyone is looking for a rogue to open their lock box, but I'm not into opening boxes for THEIR profit, unless I can make a bit for myself doing it.
Basically, aside from the very rare rare or epic contents, are other rogues finding this also? The high level boxes have the same contents as the lower ones?
Edit: According to wowhead... http://www.wowhead.com/item=16885/heavy ... x#contains should have a 13% chance of containing a major healing potion. Although the rest of the loot table aside from star ruby seems to not be listed. I remember back in BC I was actually looting poisons from these, however this doesn't seem to be the case here. IDK.. maybe it is working as intended, but you would think the contents of these higher level boxes from higher level mobs would contain better contents than what you can loot from a level 1 humanoid in goldshire.
Everyone is looking for a rogue to open their lock box, but I'm not into opening boxes for THEIR profit, unless I can make a bit for myself doing it.
Basically, aside from the very rare rare or epic contents, are other rogues finding this also? The high level boxes have the same contents as the lower ones?
Edit: According to wowhead... http://www.wowhead.com/item=16885/heavy ... x#contains should have a 13% chance of containing a major healing potion. Although the rest of the loot table aside from star ruby seems to not be listed. I remember back in BC I was actually looting poisons from these, however this doesn't seem to be the case here. IDK.. maybe it is working as intended, but you would think the contents of these higher level boxes from higher level mobs would contain better contents than what you can loot from a level 1 humanoid in goldshire.