Products currently automatically sorted by availability - how to not to have this

Site URL: https://www.theleafgallery.com.au/

Hi,

My products have recently started sorting it self automatically by availability instead of following the order on my product list. It didn't use to to do this. 

Squarespace support have advised that it has to do with code injected onto the page. If codes are disabled then it stops doing it.

The codes injected was to install a filter where customers can choose to filter products by  price, name, category or availability. It  was working fine before.

I've attached the part of the code that I can see 'availability'. I tried playing around with it but I know nothing about codes. I noticed though that now the drop down menu for filtering availability only shows "available" and "sold out". It no longer shows "all".

How can I get my product to not sort automatically by availability but to show according to the order of the product list?

Thanks,

Amelia

Thank so much Ziggy! It's fixed!!