No longer updating this addon as it has been breaking every patch. I'm back to passing group leader for now.

Party group sorter. Adds custom group sorting to Blizzard's Compact Party Frame with auto-adjusting keybinds and macros.

Features:

Party members can be sorted by Group (unitId), Role, Alphabetical, and by Class (if you like casters above melee)
Targeting keybinds and macros are auto-adjusted to target units from top to bottom when party members are not sorted by Group
Player can be sorted at top or bottom

Setup instruction for Fix Bindings and Macros:

1.  Backup your character specific macros-cache.txt (in \WTF\Account\myaccount\myserver\mycharacter\)
2.  Create or edit macros under Character Specific Macros (General Macros are ignored) †
3.  Macro name must end with "unitId$" (e.g. macro_name2$ if ithe body contains @party2) ‡
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† Macro body can only have one type of unitId in it. You can use it multiple times but can't have both @party1 and @party2 in the same macro.
‡ Enabling this option will automatically scan for eligible macros and edit the macro names for you.

Other addons you might find useful:

OmniSort - Party Group Sorter