SettingsCategory.xml - Container(5).NumItems

SettingsCategory.xml grouplist id 5, I'm trying to use Container(5).NumItems to feed an animation to centre the group list depending on the number of items. However Container(5).NumItems only counts controls that can be focused so the label id 14 isn't counted and any disabled control are not counted, thus giving the wrong item count and breaking the animation.

I've also tried Container(5).NumAllIems but that doesn't even return a value. Any ideas how to get the real item count including non focusable items like label id 14 and disabled controls?

Thanks.