diff --git a/application/models/organisation/Geschaeftsjahr_model.php b/application/models/organisation/Geschaeftsjahr_model.php
index 9c856f40e..4f0d03b73 100644
--- a/application/models/organisation/Geschaeftsjahr_model.php
+++ b/application/models/organisation/Geschaeftsjahr_model.php
@@ -20,8 +20,8 @@ class Geschaeftsjahr_model extends DB_Model
 	{
 		$query = 'SELECT *
 					FROM public.tbl_geschaeftsjahr
-					WHERE start <= now()
-					AND ende >= now()
+					WHERE start <= CURRENT_DATE
+					AND ende >= CURRENT_DATE
 					ORDER BY start DESC
 					LIMIT 1';
 
diff --git a/application/views/organisation/reihungstest/ReihungstestUebersichtData.php b/application/views/organisation/reihungstest/ReihungstestUebersichtData.php
index 931a09d80..be41e06c7 100644
--- a/application/views/organisation/reihungstest/ReihungstestUebersichtData.php
+++ b/application/views/organisation/reihungstest/ReihungstestUebersichtData.php
@@ -106,7 +106,7 @@
 				public.tbl_reihungstest
 				LEFT JOIN public.tbl_studiengang using(studiengang_kz)
 			WHERE
-				datum>now()-'5 months'::interval
+				datum>now()-'12 months'::interval
 			ORDER BY datum desc
 		) data
 		",
diff --git a/include/coodle.class.php b/include/coodle.class.php
index 41394dcb5..9f23f88da 100644
--- a/include/coodle.class.php
+++ b/include/coodle.class.php
@@ -373,7 +373,7 @@ class coodle extends basis_db
                 WHERE 
 					(uid =".$this->db_add_param($uid, FHC_STRING, false)." 
                     OR ersteller_uid =".$this->db_add_param($uid, FHC_STRING, false).")
-                    AND endedatum >= CURRENT_DATE - interval '20 days';"; 
+                    AND endedatum >= CURRENT_DATE - interval '90 days';";
         
         if(!$this->db_query($qry))
         {
diff --git a/include/konto.class.php b/include/konto.class.php
index 8d5129ec7..c23209a06 100644
--- a/include/konto.class.php
+++ b/include/konto.class.php
@@ -164,7 +164,7 @@ class konto extends basis_db
 			return false;
 		}
 
-		if(!is_numeric($this->mahnspanne))
+		if($this->mahnspanne!='' && !is_numeric($this->mahnspanne))
 		{
 			$this->errormsg = "Die Mahnspanne muss eine gueltige Zahl sein";
 			return false;
diff --git a/include/person.class.php b/include/person.class.php
index 328cc413c..a50417db0 100644
--- a/include/person.class.php
+++ b/include/person.class.php
@@ -276,7 +276,7 @@ class person extends basis_db
 				$erg += $gewichtung[$i] * $this->svnr{$i};
 			}
 
-			if ($this->svnr{3} != ($erg % 11)) //Vergleichen der Pruefziffer mit Quersumme Modulo 11
+			if ($this->svnr[3] != ($erg % 11)) //Vergleichen der Pruefziffer mit Quersumme Modulo 11
 			{
 				$this->errormsg = 'SVNR ist ungueltig';
 				return false;