LDAP search on multivalue attribute returns incorrect data

The following shows a search result which incorrectly returns all org unit records where none of the inspected results actually matched the search criteria:

***Searching...
ldap_search_s(ld, "OU=orgUnits,DC=IdentityBroker", 2, "(hierarchy=50002000)", attrList,  0, &msg)
Matched DNs: OU=orgUnits,DC=IdentityBroker
Getting 1000 entries:
Dn: CN=50022695,OU=orgUnits,DC=IdentityBroker


costCentre: 0000045240; 
costCentreGroup: CCCA; 
costCentreID: d567d5b9d344523618fc25cc2efe70e7; 
costCentreIDRef: CN=0000045240,CN=CCCA,OU=costCentres,DC=IdentityBroker; 
costCentreText: International Climate Law; 
createTimestamp: 30/11/2019 1:36:03 PM AUS Eastern Daylight Time; 
distinguishedName: CN=50022695,OU=orgUnits,DC=IdentityBroker; 
entryUUID: 08e5d654-d8a2-4b41-a516-00bd457a93b9; 
EXTOBJID: 50022695; 
hashDN: 60451482495227d7d95601c180bcceac; 
hierarchy (7): 50000100; 50000500; 50022601; 50022677; 50022687; 50022692; 50022695; 
hierarchyRef (7): CN=50000100,OU=orgUnits,DC=IdentityBroker; CN=50000500,OU=orgUnits,DC=IdentityBroker; CN=50022601,OU=orgUnits,DC=IdentityBroker; CN=50022677,OU=orgUnits,DC=IdentityBroker; CN=50022687,OU=orgUnits,DC=IdentityBroker; CN=50022692,OU=orgUnits,DC=IdentityBroker; CN=50022695,OU=orgUnits,DC=IdentityBroker; 
longText: International Climate Law Section; 
modifyTimestamp: 2/12/2019 10:23:42 PM AUS Eastern Daylight Time; 
objectClass: orgUnit; 
objectEndDate: 99991231000000.000Z; 
objectID: 50022695; 
objectStartDate: 20071203000000.000Z; 
OBJECTTYPE: O; 
orgLevel: 7; 
orgLevelName: Section; 
OU: orgUnits; 
parentOrgID: 50022692; 
parentOrgIDRef: CN=50022692,OU=orgUnits,DC=IdentityBroker; 
PLANSTAT: 1; 
PLANVERS: 01; 
shortText: DCC ID; 
status: Active; 
subschemaSubentry: CN=orgUnits,cn=schema;