diff --git a/app/Models/Service/Adsl.php b/app/Models/Service/Adsl.php
index d56b503..47f246e 100644
--- a/app/Models/Service/Adsl.php
+++ b/app/Models/Service/Adsl.php
@@ -172,7 +172,7 @@ class Adsl extends ServiceType implements ServiceItem,ServiceUsage
 			->where('date','>=',$start->format('Y-m-d'))
 			->where('date','<=',$maxdate->date->format('Y-m-d'))
 			->get()->groupBy(function($item) {
-				return sprintf('%s-%s',$item->trafficMonthStart->format('M-d'),$item->trafficMonthEnd->format('M-d'));
+				return sprintf('%s->%s',$item->trafficMonthStart->format('d M'),$item->trafficMonthEnd->format('d M'));
 		}) as $key => $o) {
 			$result->put($key,$o->sum('total'));
 		}
diff --git a/app/Models/Service/AdslTraffic.php b/app/Models/Service/AdslTraffic.php
index 016f4c1..34814da 100644
--- a/app/Models/Service/AdslTraffic.php
+++ b/app/Models/Service/AdslTraffic.php
@@ -24,7 +24,7 @@ class AdslTraffic extends Model
 	public function getTrafficMonthEndAttribute() {
 		if ($this->date->day > $this->traffic_end) {
 			// If we are the last day of the month, we'll temporarily take 3 days since Jan 31 and addMonth() results in March.
-			if ($this->date->isLastOfMonth())
+			if ($this->date->addMonth()->day != $this->date->day)
 				$this->date=$this->date->subDays(3);
 
 			return Carbon::createFromFormat('Y-m-d',$this->date->addMonth()->format('Y-m-').$this->traffic_end);