Interface issue - you can't pick the correct copy of a duration card being discard to Scheme if it is behind a copy of that same card that is not being discarded.
See http://forum.dominionstrategy.com/index.php?topic=18815.msg763128#msg763128.
See http://forum.dominionstrategy.com/index.php?topic=18815.msg763128#msg763128.