Key Influencers and Smart Narrative Visuals - Different Values

I'm using the Key Influencers and Smart Narrative Visuals to analyse a numerical field for influencers that increase it. I understood from the Microsoft Key Influencers Page Key influencers visualizations tutorial - Power BI | Microsoft Docs that the amount in the bubble the difference between the red dotted line (average amount) and green bar (influencer being analysed). However, I am getting two slightly different values? 

Furthermore, I am using the Smart Narrative on the same page (as auto-generated, no custom values) and it's giving me yet another different value.

Can anyone explain why?