Okay so I drag a button onto the page and match (2 Groups (Soft Group) on 2 layers).

I now drag and right click to produce a copy.

Repeat drag-right click to produce five identical buttons.

Arrange into neat line using drag or nudge.

Now I shift left click to select all the buttons. I apply soft group and move all buttons into position (10 groups (Soft Groups) on 2 layers).

Remove soft group (10 groups on 2 layers).

Click on each button and the mouseover/mouseoff layers have also ungrouped (1 group on layer Mouseoff).

Question
How do I re-apply 'soft grouping' for each of the buttons over the two mouse state layers?