Ordering blocks for mobile and tablet - customizer question

Hi there,
I’m getting some issues when using the ‘order’ feature in the Layout grid items system ( Container Overview - Documentation (generateblocks.com)).
I can reorder blocks (eg to when I have two blocks side by side with text in one and image in the other I can order them to stack a specific way for mobile and tablet). However… whilst I can see this in the ‘edit’ mode on that particular page where I’m editing when I look at it in the customizer I see no change.
Is this a problem with the customizer / the connection between GP/Blocks and the customizer or am I doing something wrong?
Main question - if it works in edit mode will it work on a live site?
Liz