Quest given by Fredoc Hedger bugged

[Warren Oates]

Even if you pass the bluff-check when completing the said quest, you don't get the extra 50gp from Fredoc, just the usual reward.

[Ebok]

And the normal reward is exactly the same amount that you spent, but in his dialog he says he'll give you a little extra.

[EfUA_undercover]

He gives you what you paid plus an item as the normal reward, atleast last I did it.

[Warren Oates]

and if you pass the bluff check, he is supposed to give you extra 50gp, according to the dialogue, you are supposedly saying that the item cost 100gp, and not 50gp.