getnext(object) does not get the next object in the object....but the "next" object in the project window hierarchy...
So, when you have two knobs inside a container, Knob1 and Knob2 x
getnext(Knob1) will get you Knob2.
Also keep in mind here that, unfortunately "tabs" of containers are an exception to this rule: even though they are shown in the project window hierarchy, they are not part of it - as in, if you have a Container with two tabs and Knob1, Knob3 in the first one, Knob2, Knob4 in the second tab:
getnext(Knob1) will NOT get you Knob3, it will get you Knob2.
