you have dozens of them,
thus when you delete one, the remaining ones give the impression that you haven’t deleted it.
try to move them a bit, then watch them go when you press Delete …
I went to View > Toolbars > Form Control and checked.
Then entered design Mode then highlighted each button and pressed Cut. There may be much more than dozens. Will return to this tomorrow to clear all remaining buttond, then setup one button again.
Define a socalled “database range” for your list. Call menu:Data>Define… and check extra option “Contains Header”.
Call menu:Data>Sort… and do the sorting manually.
Install Quick Sort Macros » Extensions, click any cell in the column to be sorted and use the right toolbar button to sort ascending or descending.
The extension macro sorts the defined database range by the active cell’s column according to all the extra options you defined for the sort order and for the database range.