I've just ran into this and either I don't understand it or it wasn't designed well. Or Both.

I have a Listview on my form (designer), and I right click on the listview and goto EDIT COLUMNS.
I added 3 columns, and hit OK. Run the app, and all 3 columns look fine. Now i want to add a 4th column between the existing columns 1 and 2. So I see the Sort arrows that move my newest tab up the list, which would intuitively mean that thats the order it shows up when displayed at run time.

But when I run the app, the 4th column is still in the last location, even though it shows up correct in the list in the EDIT COLUMNS editor area. It seems that the "Display Index" property defines what order they show up in. But on the sorting list, that Member number is what I think should be used for the Display Index.

So attempting to renumber them is also impossible, since I can't just change the first number to something like 1000 and then change it back after I change the other ones around, and I can't retype the same number. The validation is done on the field change, when it should be done on the form accept.

So thats 2 related poor designs/bugs that I found with it. Unless someone can explain what the idea behind that design is.?