Unit grouping issue

Okay, all the triggers involved are inside the hidden tags below.

Hidden information: Trigger: Make Round Events Time - BetweenRounds expires Conditions Actions Countdown Timer - Destroy BetweenRoundsWindow For each (Integer A) from 1 to NumPlayers, do (Actions) Loop - Actions Set CurrentSpawn = (Random integer number between 0 and 5) For each (Integer i) from 1 to EnemyTypes[Round], do (Actions) Loop - Actions For each (Integer B) from 1 to EnemyNum[((Round x MaxTypes) + (i - MaxTypes))], do (Actions) Loop - Actions Set TempPoint = (Random point in SpawnPoints[CurrentSpawn]) Unit - Create 1 EnemyType[((Round x MaxTypes) + (i - MaxTypes))] for Player 12 (Brown) at TempPoint facing Default building facing degrees If (((Last created unit) is A Hero) Equal to True) then do (Hero - Set (Last created unit) Hero-level to BossLevel[(Round / 5)], Hide level-up graphics) else do (Do nothing) Unit Group - Add (Last created unit) to Attackers[(Integer A)] Set LiveEnemies = (LiveEnemies + 1) Custom script: call RemoveLocation (udg_TempPoint) Set InRound = True Trigger - Run Keep Going <gen> (ignoring conditions) Game - Display to (All players) the text: RoundText[Round] Trigger: Keep Going Events Time - Every 10.00 seconds of game time Conditions InRound Equal to True Actions For each (Integer A) from 1 to (Number of players in (All players controlled by a User player)), do (Actions) Loop - Actions If (All Conditions are True) then do (Then Actions) else do (Else Actions) If - Conditions Beaten[Players[(Integer A)]] Equal to False Then - Actions Set TempPoint = (Random point in BaseZones[(Integer A)]) Unit Group - Order Attackers[(Integer A)] to Attack-Move To TempPoint Custom script: call RemoveLocation (udg_TempPoint) Else - Actions Set Rand = (Random integer number between 0 and NumPlayers) Set TempPoint = (Random point in BaseZones[Rand]) Unit Group - Order Attackers[(Integer A)] to Attack-Move To TempPoint Custom script: call RemoveLocation (udg_TempPoint) Trigger: Enemy Death Events Unit - A unit owned by Player 12 (Brown) Dies Conditions Actions Set LiveEnemies = (LiveEnemies - 1) If (LiveEnemies Equal to 0) then do (Trigger - Run Round End <gen> (checking conditions)) else do (Do nothing) If (All Conditions are True) then do (Then Actions) else do (Else Actions) If - Conditions ((Dying unit) is A Hero) Equal to True Then - Actions Hero - Instantly revive (Dying unit) at (Random point in Pit of Shame <gen>), Hide revival graphics Set DyingScore = (Hero level of (Dying unit)) Else - Actions Set DyingScore = 1 Set Kills[(Player number of (Owner of (Killing unit)))] = (Kills[(Player number of (Owner of (Killing unit)))] + DyingScore) Trigger - Run Update Scorerboard <gen> (ignoring conditions) Trigger: Round End Events Conditions LiveEnemies Equal to 0 Actions Set InRound = False If (All Conditions are True) then do (Then Actions) else do (Else Actions) If - Conditions IsSpecial[Round] Equal to False Then - Actions Countdown Timer - Start BetweenRounds as a One-shot timer that will expire in 30.00 seconds Set Round = (Round + 1) Countdown Timer - Create a timer window for BetweenRounds with title (Time until Round + (String(Round))) Set BetweenRoundsWindow = (Last created timer window) Countdown Timer - Show BetweenRoundsWindow Else - Actions Trigger - Run Special End <gen> (checking conditions) For each (Integer A) from 1 to NumPlayers, do (Actions) Loop - Actions Unit Group - Remove all units of (Units in (Playable map area)) from Attackers[(Integer A)]

What these are supposed to do is spawn units, making one group for each player that's in the game, then have each group attack-move to the corresponding player's base. Everything works perfectly in round 1, but in round 2 and beyond only some of the units seem to get selected, while the other ones just stand around in the spawn area doing nothing. I have tried everything I can think of to fix it, including destroying and recreating all the unit groups with custom script, and nothing seems to work. (That loop at the end of the round end trigger was among my efforts to try and fix the problem, with and without it it still messes up.)

I should note that every function other than moving the units works perfectly; the spawning and the hero revival work just fine. And those units that do move go to the correct places, too.

Can anyone help me with this? If it can't happen, I might as well stop work on the map right now and never return.

Are your unit groups larger than 12 units? The "issue order to unit group" action does not work with more than 12 units (you can't select more than 12 units, so it's possible the code for group movements that makes sure the units maintain formation was hardcoded to work with a maximum of 12 units at once). If this is your problem, the only thing you can do is either issue the orders to each unit in the group individually or split your attack waves into multiple groups that are each smaller than 12 units.

Some are and some aren't, but it's possible that it's trying to select units that are already dead too. So, would a "pick every unit in attackers[blah] and do (order unit to attack-move)" do the trick? I'm gonna try that. (Would I need anything special to keep that from leaking since these are established variable groups?)

EDIT: It works perfectly now, thank you so much.
Here's the revised version of the keep going trigger:

That should do the trick, it also shouldn't leak.