[JimmXinu]

Originally Posted by Bigo2

Yes, but that's how the 'v' appears after you sorted out putting "A" on top. It is showing the next direction if you click it again... Clicking it would reorder all library starting from "Z" on top of the screen and the Read Order list would be A-Z down there at the bottom bellow the Z-A listing of the entire library...

That.... is not how it works for me at all. The triangle/carrot/up/down indicators show the current sort direction (up A-Z, down Z-A) on the last sorted column.

You seem to thing it's exactly opposite? Because it shows you what you'll get next time you click it?? It's possible you are using a different OS or a different theme with different indicators, I suppose.

But it seems more likely to me that you:

1. Clicked on some column, say Title, to sort A-Z.
2. Clicked on your custom series column twice, telling it to sort Z-A, which it does.
3. However! Because all those other books don't have any value in that custom series column, the previous sort is still being applied to them and they still show up Title A-Z.
4. And only the books with something in your custom series column are sorted Z-A on that column.

Regardless: Reading List will save a value to a series column for you. Once that value is saved, how it sorts is not controlled by Reading List. If you think Calibre isn't sorting correctly, you'll have to take up with Kovid in the main Calibre thread.

Spoiler:

I will add something I stumbled across recently that might make a difference:

What Language is set for a book can effect sorting of the Title and built-in Series column, at least. 'The Something [1]' on a book marked Russian sorted after 'The Something [2]' on a book marked English because English sorted on 'Something, The' and Russian didn't treat 'The' special.