Wildspire Waste : Treasure #4 (spoilers)

[Flo]

https://www.powerpyx.com/wp-content/uploads/monster-hunter-world-iceborne-treasure-location-wildspire-waste-4-1.jpg

Sporepuffs : 1
Flashflies : 2
Paratoads : 3

3 - 1 = 2
2 x 3 = 6

2;6 means "Westmost Cactus"

Problem : after checking a guide, the correct answer is 3;6 : "Southmost Cactus".
How the hell do you get 3 instead of 2? If I had missed a paratoad, the second result would also be wrong. I don't see any way to get 3 and 6.

Can anyone explain?

[Blazes Dragoon]

The answer is westernmost cactus, which is the cactus near the first camp(around border of area 1 and 4)

From what I have gathered many seem to mistake it for the southernmost cactus, though it has one other barely further south than it(that being the cactus in area 9.)

[Flo]

I just did it and it was clearly the sourhmost cactus, at the frontier of areas 1 and 4

There are other cactii way more to the west, so it can't be westmost

[ChubbNutt]

It's the one closest to the first camp. You don't even have to do the math since the only options are the farthest most options, so you can just run the borders of the map and you'll get it.