Program: 172833
Project: 172833
Buggy source:
@Override public CommandResult execute(CommandSource source,CommandContext context) throws CommandException {
  if (source instanceof Player) {
    Player player=(Player)source;
    String playerFactionName=FactionLogic.getFactionName(player.getUniqueId());
    if (playerFactionName != null) {
      if (FactionLogic.getLeader(playerFactionName).equals(player.getUniqueId().toString()) || FactionLogic.getOfficers(playerFactionName).contains(player.getUniqueId().toString())) {
        if (EagleFactions.AutoClaimList.contains(player.getUniqueId().toString())) {
          EagleFactions.AutoClaimList.remove(player.getUniqueId().toString());
          player.sendMessage(Text.of(PluginInfo.PluginPrefix,TextColors.GOLD,"String_Node_Str",TextColors.WHITE,"String_Node_Str",TextColors.GOLD,"String_Node_Str"));
          return CommandResult.success();
        }
 else {
          EagleFactions.AutoClaimList.add(player.getUniqueId().toString());
          player.sendMessage(Text.of(PluginInfo.PluginPrefix,TextColors.GOLD,"String_Node_Str",TextColors.WHITE,"String_Node_Str",TextColors.GOLD,"String_Node_Str"));
          return CommandResult.success();
        }
      }
 else {
        source.sendMessage(Text.of(PluginInfo.ErrorPrefix,TextColors.RED,"String_Node_Str"));
      }
    }
 else {
      source.sendMessage(Text.of(PluginInfo.ErrorPrefix,TextColors.RED,"String_Node_Str"));
    }
  }
 else {
    source.sendMessage(Text.of(PluginInfo.ErrorPrefix,TextColors.RED,"String_Node_Str"));
  }
  return CommandResult.success();
}

Fixed version (ground truth):
@Override public CommandResult execute(CommandSource source,CommandContext context) throws CommandException {
  if (source instanceof Player) {
    Player player=(Player)source;
    String playerFactionName=FactionLogic.getFactionName(player.getUniqueId());
    if (playerFactionName != null) {
      if (FactionLogic.getLeader(playerFactionName).equals(player.getUniqueId().toString()) || FactionLogic.getOfficers(playerFactionName).contains(player.getUniqueId().toString())) {
        if (EagleFactions.AutoClaimList.contains(player.getUniqueId().toString())) {
          EagleFactions.AutoClaimList.remove(player.getUniqueId().toString());
          player.sendMessage(Text.of(PluginInfo.PluginPrefix,TextColors.GOLD,"String_Node_Str",TextColors.WHITE,"String_Node_Str",TextColors.GOLD,"String_Node_Str"));
          return CommandResult.success();
        }
 else {
          EagleFactions.AutoClaimList.add(player.getUniqueId().toString());
          player.sendMessage(Text.of(PluginInfo.PluginPrefix,TextColors.GOLD,"String_Node_Str",TextColors.WHITE,"String_Node_Str",TextColors.GOLD,"String_Node_Str"));
          return CommandResult.success();
        }
      }
 else       if (EagleFactions.AdminList.contains(player.getUniqueId().toString())) {
        if (EagleFactions.AutoClaimList.contains(player.getUniqueId().toString())) {
          EagleFactions.AutoClaimList.remove(player.getUniqueId().toString());
          player.sendMessage(Text.of(PluginInfo.PluginPrefix,TextColors.GOLD,"String_Node_Str",TextColors.WHITE,"String_Node_Str",TextColors.GOLD,"String_Node_Str"));
          return CommandResult.success();
        }
 else {
          EagleFactions.AutoClaimList.add(player.getUniqueId().toString());
          player.sendMessage(Text.of(PluginInfo.PluginPrefix,TextColors.GOLD,"String_Node_Str",TextColors.WHITE,"String_Node_Str",TextColors.GOLD,"String_Node_Str"));
          return CommandResult.success();
        }
      }
 else {
        source.sendMessage(Text.of(PluginInfo.ErrorPrefix,TextColors.RED,"String_Node_Str"));
      }
    }
 else {
      source.sendMessage(Text.of(PluginInfo.ErrorPrefix,TextColors.RED,"String_Node_Str"));
    }
  }
 else {
    source.sendMessage(Text.of(PluginInfo.ErrorPrefix,TextColors.RED,"String_Node_Str"));
  }
  return CommandResult.success();
}