FK shoulder weirdness

Here is the problem I'm figuring out at the moment.

I first controlled the hand from the shoulder control to front position and stop there. Then I move it down. For some reason there comes a sideways motion aswell. What if I don't want that?

I first used the GIM -tagged shoulder, then I tried with the "right" control aswell. But the issue stays put.

In the curves I see there is motion in the X and Y aswell. But my simple logic processor says there should only be motion in Z and X. Or Z and Y.. Why then does it..? What is this?

This feels like it's the root of the "problem".

Problems are nice, they make me think of stuff. It's always nice to dig in to a issue, do testing and rule out possible causes.



Edit. Problem solved.

I found info from some thread about Gimbal-controls. In the shoulder there is another set of controls, and using them I was able to make the shoulder go as I wanted. For the forward motion I used the regular control and for the down motion I used Gimbal.

This seems to be one solution but it's a tricky thought to use 2 different controls. That results in two different sets of keyframes in different locations. But, it works.