No guarantee this will fix your problems, but here's my 2 cents:
1.) Can take up to 15 - 25 seconds to update after putting the weapon away. Usually if you were actively fighting something before putting your weapon away.
2.) Droprate for those Items sucks. Hard. And the higher your support quest level gets, the lower the dropchance. (Remember the "Anurakiti Directive" in Inggison pre 6.x? Had to kill over 150 Mobs to get this one. Dropped on the first mob on an alt.)
3.) Is there a Garrison nearby? Owned garrisons turn many nearby "XXXXX" mobs into a "Raging XXXXX" oder "XXXXX Raver". Those do not count for quests. Wait for the Legate of the garrison to be killed, then the normal versions return.
Hope it helped you in some cases 