That is not how it works, the odds of hitting a specific slot gets low as you turn to either side.
And the 0.2 is right in the middle on the green line, so that slot has higher probability to hit than any other slot.
Looks like you have confused about the blue line and the green line.
The blue line has only one "losing spot" x0.2 and you have 13.3% to hit it.
The green line has a x0.4 in the middle and you have 19.6% to hit it.
Yes I mixed up 0.2 and 0.4, that is correct.
The point was that just because it is only there one times does not mean that is has low proberbility to hit.
Thanks for the exact numbers I did not know them. I have seen then at some point. But do not remember where they are written down.
Drag your cursor to the line, you will see all probability there.