gantry 5axiskins correct joint assignment

I'm building a 5 axis XYZBC mill, where Y axis is a gantry. 
I've got my 6 joints moving in joint mode using the XYZBC 5 axis bridge mill as a starting point.
On screen it looks good and is working as it should, but I don't get it, how to configure the second Y joint working together with primary Y joint.
Looking at the example config it looks like joint5 for W axis has the parameters as joint1 for Y axis, but my understanding is that UVW axis are tool movements.
I've build gantry machines before and XYYZ somehow did the trick.
I guess I got confused by the Name "5 axis bridge mill" but this configuration doesn't have a gantry in it.
So, do I have to add another joint for my second Y and how do I include that in the ini file sections in the right order?

Thanks Ju 

cleaned up some mess in config files. but still no luck getting the second Y moving in world mode.

 

You need HOME_SEQUENCE = -1 for both Y axs,

also you have more joints defined here
[TRAJ]
COORDINATES = X Y Z B C Y W

than what you have in your ini file