Vaal Pact, visual or real bug?

"Life Leech total Recovery per second Modifier" is listed at 180%
I have a total of 40% "increased total Recovery per second from Life Leech" from the passive tree
I have no sources of increased recovery from gear, pantheon, or ascendencies.

This implies that Vaal Pact is doing (1+0.4*2) which makes no sense. If Vaal Pact is affecting this stat, it must be a TOTAL multiplier of 2 because of how it is simply worded. I should see (1+.4)*2=280% which is very different from 180%. It also would not be correct to split the 2 because that would need to show a value of 80% not 180%.

Is this a visual bug or a real bug? If you think the answer is neither then you are mistaken and should not attempt to answer until you realize whatever mistake you made.

I am hoping someone has already found this information out or someone has a larger leech amount that they can test this with easier than my build.

Hmm...
No idea if it's purely a visual thing or not.
However, it's possible that the game does indeed (1+0.4)*2=280% internally, but then substracts 100% from the result to define "Life Leech total Recovery per second Modifier", don't ask me why.

Because that's is what makes sense.

If you had two sources of 40% more damage, you would say you had 96% more damage right?

you do 1.4*1.4 to see that your total damage is at 1.96, then to translate into a standard form relatable to value 1, you say it was 96% more.

Bump.