Series ordering?

[Sarah]

I tracked down some of the missing volumes of this series, but I can't figure out how to get them in the right order:
https://www.goodreads.com/series/1277...

28, 29, 19, 30, and 41 are the problems. Nothing appears to happen when I click the green arrow buttons which I assumed were there for sorting.

[Arenda]

Don't click the green arrow, you can drag the green arrow up or down.

[Sarah]

...you can...drag...the...

Okay, I think I need another vacation.

(Thanks!)