[snip]
>(only the card  I clicked appears, and the stack cannot be moved).

Refer to the previous discussions about the stack move policy.  The single
card display is because it reverts to the behavior of displaying a partially
hidden card when you hold the left button down.  This is useful for Aces
where you can't see the suit.  Windows FreeCell uses the right button for
this.
It feels normal on an unordered stack but seems strange if you are expecting
to pick up an ordered stack this is too big to move.

-david