To further clarify, the rewards for the Epic Quests are scaled to the level of the quest, not the character. Because Bobo bypasses the level requirement, the rewards can possibly scale outside the character's usage of them, which is what happened here.
You will have the same experience in the Epic Cat room if you use the NPCs there to complete the Epic Books.
Tavern shenanigans!
Thank you for bringing this to our attention though, and by all means if you notice similar behaviour while completing quests legitimately please let us know!!
Quality Assurance Team Lead
The Lord of the Rings Online
"All we have to decide is what to do with the time that is given us." -Gandalf