Wrong card ease statistics

Some cards are not included in the card ease statistics in Anki 2.1.35:

The ease graph currently only includes cards that are currently in the review state. If the cards are in (re)learning, they will not be included.

Then it’s better to add a hint above or below the graph something like that: “Includes cards only in the review state”.

Another point that causes confusion.
If the chart is shown in 10% increments. The pop-up window says “X cards with 150% ease”, but it also includes cards with 155% ease.
It will be clearer if you write a interval instead of a number “X cards with 150%-159% ease”