Random vs shuffle

HTML RESULT
{sequence 'A..Z'}
{$sequence}
{/sequence}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
{sequence 'A..Z', shuffle}
{$sequence}
{/sequence}
E R A J D S V X O B I Z P T M G N L K Y Q C W H F U
{sequence 'A..Z', shuffle, sort}
{$sequence}
{/sequence}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
{sequence 'A..Z', random}
{$sequence}
{/sequence}
O W N R Q P H C W C K U M G P X S Q A G A K G E X A
{sequence 'A..Z', random, sort}
{$sequence}
{/sequence}
B C E F F H I I J K K K M N N O O T U V X X X Y Z Z

HTML RESULT
{sequence 'A..Z', random, unique, sort}
{$sequence}
{/sequence}
A B E G H I K L O P R T V W X Y Z
{sequence 'A..Z', random, dedup, sort}
{$sequence}
{/sequence}
A B C E F G I J L O P Q R T U X Y Z
{sequence 'A..Z', reverse}
{$sequence}
{/sequence}
Z Y X W V U T S R Q P O N M L K J I H G F E D C B A
{sequence 'A..Z', reverse, sort}
{$sequence}
{/sequence}
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z