Audit partition anomaly

IF (CONVERT(int, (SELECT SERVERPROPERTY('EngineEdition'))) = 3) 
        BEGIN 
                SELECT  partition_number AS 'PartitionNumber' 
                                , prv.value AS 'End Date' 
                                , used_page_count*8 AS 'Size in KB' 
                FROM sys.dm_db_partition_stats pst LEFT OUTER JOIN sys.partition_range_values prv ON prv.boundary_id = pst.partition_number 
                WHERE object_id = object_id('AuditBase') 
                AND index_id in (0,1) 
        END 
ELSE 
        BEGIN 
                SELECT  DATENAME(qq, CreatedOn) AS 'Quarter' 
                                , YEAR(CreatedOn) AS 'Year' 
                                , COUNT(*) AS 'Rows' 
                FROM AuditBase 
                GROUP BY DATENAME(qq, CreatedOn), YEAR(CreatedOn) 
                ORDER BY 'Year','Quarter' 
        END