Cannot customize woocommerce sidebars no matter what I do

I've read dozens of posts similar to this but not the same and I cannot figure this out.
I've deactivated plugins, reset cache, verified GP theme and Premium versions, etc.

The whole WooCommerce section of the site has a right sidebar that I don't want. I would like to have a left sidebar and utilize woocommerce sidebar features - but I can't get it to show up either. The ONLY control I have over the WooCommerce sidebars is to add/subtract elements from the 'Right Sidebar' in the widgets panel.

I can't even seem to just make it go away with a filter either. I tried this filter using the 'snippets' plugin:

add_filter( 'generate_sidebar_layout','tu_custom_woocommerce_sidebar_layout' );
function tu_custom_woocommerce_sidebar_layout( $layout )
{
        // just make it stop...
 	return 'no-sidebar';
 }

It does nothing. The filter is running - my die() statements work. The right sidebar still shows up. It is the default blog right sidebar that has archive links in it.

I have made sure that the page settings for the WooCommerce shop page are default (not full width)
I tried setting the page to have the sidebar layout: Sidebar/Content. That had no effect
I went through the customizer->layout->woocommerce and any sidebar changes there don't have an affect (I chose Sidebar/Content)
I went through the customizer->layout->sidebars and any sidebar changes there don't affect anything (tried them all)
I tried a custom sidebar plugin. I was able change the right sidebar to the custom one I created. But when I try to change it's location from right to left, that change doesn't work. I am left with the default blog right sidebar again.

I don't understand what master-control setting is forcing this right sidebar! I don't want to use CSS to make it display:none. That seems like a hack. I want control over where the sidebar shows and what it shows.

Please lend a hand.

Desperately Seeking Sidebar