Thanks.
Thing is, you are supposed to figure what the controls do with trial and error. Different levels have different things in different places, it won't always be scale, position, rotation etc. Definitely get how that would be confusing and difficult to understand but that's just the intended experience.
Difference between the dials is that left two are more sensitive. and they can work as 1D and 2D (position scale etc) values. While the right most dial is less sensitive and works for only 1D values.