The name of the combobox is not YPMatchSearch, that's just what is on the label, the combobox name is Combo133. The combobox bound column is 1, the YPID field.
This seems to work:
SELECT OrganizationsT.OrgName, YPsT.YPLookupName
FROM OrganizationsT, YPsT
WHERE YPsT.YPID=[forms]![MatchSelectedYPF]![Combo133] AND
((OrganizationsT.[OrgArtsCulture]=True And [YPsT].[YPArtsCulture]=True)
Or (OrganizationsT.[OrgEnvironmental]=True And [YPsT].[YPEnvironmental]=True)
Or (OrganizationsT.[OrgHealthcare]=True And [YPsT].[YPHealthcare]=True)
Or (OrganizationsT.[OrgYouthMentorship]=True And [YPsT].[YPYouthMentorship]=True)
Or (OrganizationsT.[OrgPovertyBasicNeeds]=True And [YPsT].[YPPovertyBasicNeeds]=True)
Or (OrganizationsT.[OrgSportsAthletics]=True And [YPsT].[YPSportsAthletics]=True)
Or (OrganizationsT.[OrgIntlDiversity]=True And [YPsT].[YPIntlDiversity]=True)
Or (OrganizationsT.[OrgBusiness]=True And [YPsT].[YPBusiness]=True));
Delete the duplicate record #4 for Samantha.