Yep, I have found more users find this confusing, but there is no cheating going on in the images. The game has 'hi', 'low' and 'grey area'. When a number falls in the range of the grey area, neither hi or low will be correct, the website wins.

Changing the odds, increases the grey area.

I am not saying they don't manipulate things, but they are not doing what you are trying to prove.