Oath Scroll Reward

I always get 5000 Unvealer’s Oath for 1 Oath Scroll, a friend of mine is getting 6000 per Scroll. He needs 59 Scrolls to get the journey completed I need 70 Scrolls. Why?

He uses his smoldering ashes the right way.

How can I use it the wrong way then? We played step by step in parallel. He gets 6000 per scroll I get 5000 per scroll.

You can spend smoldering ashes to increase oath by 20% and 20% on 5000 is 1000.
So 5000+1000=6000