KMR formula question

Mixing instructions are not very clear and my family is insisting that I am doing it wrong. The directions read 2 scoops mix for 3 scoops of water....Now I am interpreting this to mean equal amounts, but hubby and son say that the small side is for the formula mix and the larger side for the water.......
Who is right? (I think I am)
Thanks
Deb

It means that there's 3 parts water and 2 parts mix The large is for water and the small is for mix.

Boy do I feel stupid. I was using the large side for both - 2 mix and 3 water! No wonder the babes had a stomach ache! YIKES!! It was my fault!! Guess it was too rich for them. I also wondered why I had gone thru soooooo much in less than a week!
Thank you and please excuse my ignorance. Now I have to tell the boys they are right!