Adding Volume Column

I ve this XM:

when i open in rns, it has some behaviours i cannot fix:
some track has not the Volume column ( how do i add them???)

some sample are there, volumes seems OK, but they have no output!

see by urself and tell me:



Nice dists :)

The third button below the speed settings show and hide the volume column. Having a quick look I could only find one sample with no sound and that was because the sample properties / amplify was set to zero.