if(updateList.get((Account)accObj) == null )
{ // Avoid DUPES...
    updateList.add((Account)accObj);
}

Map<String, Account> updateMap = new Map<String, Account>{};

if(!updateMap.containsKey((String)accObj.get('Id')) //check that Acc Id not already added
{ // Avoid DUPES...
    updateMap.put((String)accObj.get('Id'), (Account)accObj);
}

Database.update(updateMap.values());

// Listing Agreement Section Names in to Map
        for(OISP_Agreement__c argmnts:lstAgreement){

            //List<OISP_Agreement__c> sectionNamesList = mapSectionAgreement.get(argmnts.OISP_Agreement_Section__r.name);

            if(mapSectionAgreement.containskey(argmnts.OISP_Agreement_Section__r.name)){
                List<OISP_Agreement__c> sectionNamesList = mapSectionAgreement.get(argmnts.OISP_Agreement_Section__r.name);
                sectionNamesList.add(argmnts);
                mapSectionAgreement.put(argmnts.OISP_Agreement_Section__r.name,sectionNamesList);
            }
            else{
                List<OISP_Agreement__c> sectionNamesList = new List<OISP_Agreement__c>();
                sectionNamesList.add(argmnts);
                mapSectionAgreement.put(argmnts.OISP_Agreement_Section__r.name,sectionNamesList);
            }
        }