This will help demonstrate.I am not saying those odds are correct, but you can get similar odds to those due to the SGM formula not being the same as a normal multi.
I can't think of another way to explain it to you so hopefully someone else can help.
This is a sgm.
You would think when U multi them together you would get 1.06 x1.06x1.12 =1.26odds
But no.
sb off me $1.44 instead.
This is what freo leo means by getting a little bit of a bonus in putting them in a multi.