A quick test as it is auto way of qlikview Enviroment you just delete that List Box create again or creat a New sheet and create a New List box and check.
else You have several other options in sort like sorting with Expression can easily come with solution or try others one by one.
if not solved you can attach a sample and you will get a solution for sure
Thanks for the quick response.
I'd figured out what the issue was and it looks as though it was because I was using an expression for the list box:
I didn't realise but using expressions hinders Qlikview's ability to properly sort the possible selections within a list box.
Unless there's something else I'm unaware of?