brooke_babington on "[Theme: Customizr] Responsive sidebars"

I love the Customizr theme and have taken full advantage of all its features and have my site working exactly how I want it! I now just need to fix an issue with the way it appears on mobile devices and I'm ready to go live.
I have set my front page to display 2 latest posts and have reordered my Customizr child-theme to show these posts at the top of the homepage followed by the featured pages using the my_custom_hook option.
I have my front page layout set to 2 sidebars and have selected the checkbox to 'enable blocks reordering on small devices' which I assumed would shift the sidebars to the bottom of the layout when viewed on mobile devices.
When viewed on mobile devices however the left sidebar remains in place which forces the post text to be unreadably narrow. Also, while the featured page images all resize beautifully, the post images don't resize and are forced to the far right of the screen and cut off.
Any idea why this could be happening? Many thanks for your terrific support and great theme!!