When using a file created in a previous QlikView version, some list boxes suddenly don't sort correctly. And when I look at the sort settings, its set to Auto Ascending. The manual states this:
Sorts the field values according to their logical state (selected, optional or excluded). If you want the sort order to resort to State Ascending each time the list box is resized and the total number of values is not displayed, you can leave the default sort order, Auto Ascending, on. If all the values are displayed, then the State sort order will be switched off.
So auto ascending turns off, if all values are selected, my objects did not sort properly when something was selected.