I have a batch class that updated a custom object when a trigger runs. 

Sceniro: Someone adds a state to a multi select picklist. The trigger will grab all states, and throw the last state in the variable. I then grab the id of the record in another variable. I pass both of those variables over to a batch class and run a query on another custome object, and update the fields. 

Problem is, when I get to the update part, the first field (Flow_Kick_Off__c) gets the value of the variable, but the other field (Territory__c) does not..... I don't understand why one field is getting updated, but not the other. 

Here is the trigger:

trigger updateFacility on Territory__c (before insert, before update) {
    
    //Adding a state index is -1. Removing a state index is normal.
    
    String[] oldStates;
    String[] newStates;
    Integer countStates;
    Integer countOldStates;
    Integer countNewStates;
    String terrID;
    String terrState;
    
    if(Trigger.isUpdate) {
        for(Territory__c oldTerr : Trigger.old) {
            oldStates = oldTerr.states__c.split(';');
            countOldStates = oldStates.size();
            terrID = oldTerr.Id;
        }
        
    }
    
    else if(Trigger.isInsert) {
        
    }
    
    for(Territory__c newTerr : Trigger.new) {
        newStates = newTerr.states__c.split(';');
        countNewStates = newStates.size();
        
        if(countNewStates > countOldStates) {
            terrState = newStates[countNewStates-1];
            System.debug('TRIGGER ID = ' + terrID);
            System.debug('TRIGGER STATE = ' + terrState);
            FacilityUpdates db = new FacilityUpdates(terrState, terrID);
            database.executeBatch(db, 75);
        }
        
        else {
            
        }
        
    }
    
    
}

Here is the class: The only field that is not updating is (Territory__c)

global class FacilityUpdates implements Database.Batchable<sObject> {
    
    global String terrState;
    global String terrID;
    
    
    global FacilityUpdates(String myStates, String terID){
        terrState = myStates;
        terrID = terID;
        system.debug('STATE = ' + myStates);
        system.debug('ID = ' + terID);
    }
    
    public String query;
    
    global Database.querylocator start(Database.BatchableContext BC){
        
        //String newString = '\'';
        system.debug('INSIDE EXECUTE STATE = ' + terrState);
        
        query = 'Select id, Name, physical_State__c, Territory__c FROM Facility__c WHERE physical_State__c = :terrState';
        //query = 'Select id, Name, physical_State__c, Territory__c FROM Facility__c WHERE Territory__c = :terrId AND physical_State__c includes ' + states;
        
        
        system.debug(query);
        return Database.getQueryLocator(query);
    }
    
    global void execute(Database.BatchableContext BC, List<sObject> scope){
        List<Facility__c> accns = new List<Facility__c>();
        for(sObject s : scope)
        {
            Facility__c a = (Facility__c)s;
            a.Flow_Kickoff__c = terrID;
            a.Territory__c = terrID;
            accns.add(a);
        }
        update accns;
        
    }
    
    global void finish(Database.BatchableContext BC) {
        
    }
    
}