In the staff interface, if you edit a list and try to change the sort by choosing an option from "Sort this list by", it gets changed to "Publication year" instead of your selection, and it becomes permanently stuck with this sort. As noted on bug 40312, the sort for the list contents also doesn't work. For instance, if it's the default "Title", it seems to be sorting by biblionumber ascending. (Note that this sort order doesn't affect the sort order for the OPAC list contents but it might not have ever worked for it anyway)