Since the changes to the dungeon drops for upgrading the nexus to zodiac, it would seem that the text in the journal has not been updated to reflect this.
As far as I recall, dungeon drops were increased to 100% for 'A Treasured Mother', 'Labor of Love', 'A Ponze of Flesh' and 'Method in his Malice'; however the Journal 'Description' for each quests still reads :
* By completing a dungeon there is a small chance that you will obtain the associated item
I'm not so good at maths but I'm fairly sure 100% is a lot more than a 'small chance' :P
Not major concern but I was wondering if this was an oversight from when the drop rate of the items for the quest was changed