you can assign the same weapon/ item to both buttons, which if done
then you select another item sometimes like with bombs when you use
a bomb then the old selected item will pop back up in place of the bomb,
then you have to reselect the bomb again.
Item assignment
Yes; I fixed the item selection a few builds ago, but glossed over the complications added by the A-button-selectable rule. I need to go back and investigate thoroughly.
Fixed in the next build.