Need help! Rogue quest glitched :<

[GoAL!]

First, are you sure the npc you mean is Hollgrehen Junior? There is actually a fourth npc call Hermanthorn Jr which might be the one that you should actually meet. The infomation about it is not avaliable on ratemyserver but it is implemented in irowiki. Try the following website
http://irowiki.org/wiki/Rogue_Job_Change_Guide
It might be the solution to your problem (I actually face the same problem before, all those three threatening to kill me, and then it was the fourth one who i should actually meet...)
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handicap goal - Lord Knight 97/66
Negarakuku - Stalker 91/60
goal - Sage 86/50