Why is it not ppssible to browse all products, sorting on lowest price?

On all these sites it is not possible to sort products by lowest price first:

This has been so for a while.

Two questions:

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Apparently,

For Logos: the sorting actually works.

For Verbum:

If you select the sorting by Price (lowest first), the following incorrect link and an error given:
https://search.verbum.com/search?context=product&sortBy=price-low&limit=15&page=1&view=list
The following link does give some results, but they are not sorted from low to high:
https://search.verbum.com/search?context=product&sortBy=price-lo&limit=15&page=1&view=list

For Noet similarly:

If you select the sorting by Price (lowest first), the following incorrect link and an error is given:
https://noet.com/search?context=product&sortBy=price-low&limit=15&page=1&view=list
The following link does give some results, but they are not sorted from low to high:
https://noet.com/search?context=product&sortBy=price-lo&limit=15&page=1&view=list

Questions still last:

FWIW, this thread probably belongs in the logos.com forum.

-Donnie