The current version has different commands:
Move single item: moves one item from a stack (e.g. 1 rock from a stack of 10 rocks).
Move an amount of items: queries how many to move and moves the amount.
Move item stack: moves all items in the stack.
The first command does not show a query. The second command always shows the query. The third command does not show a query normally, only when the destination can not hold all of them.
Also (and this may be a bug): for items that are counted by charges (ammo or certain food, e.g. aspic (100)), the first and command moves the whole stack (because it’s internally a single item).
(You may need to update the key bindings, enter the AIM, press [tt]?[/tt] and adjust as you wish.)