Problem w/ geting a unique set of records. Too many rows returned

Question

This is a query that is looking at itself for two diff reasons.
The d pass is to search the records that are not voided and pass lmc is the records that are the voids.
I have to identify the valid recs to be voided and then mark them accordingly but I am getting repeating values
SELECT DISTINCT
d.CHARGE_ID,
lmc.CHARGE_ID as CHARGE_ID_THAT_VOIDED_ME ,
ROW_NUMBER() OVER (PARTITION BY d.charge_id ORDER BY LMC.SOURCE_SYSTEM_RECORD_ID DESC ) AS rown
FROM CHARGES d
INNER JOIN CHARGES lmc
ON d.Encounter_id = LMC.ENCOUNTER_ID
WHERE d.TRANSACTION_TYPE_CODE = 0 --not voided
AND lmc.transaction_type_code = 1 --void records that have limited values to tell me what to void
AND d.SOURCE_SYSTEM = 'MM' --this is my source system
AND ( d.IMPUTED_SB_MAP + lmc.IMPUTED_SB_MAP) = 0 --sadly one of those values is the dollar amt. Problem occurs when there are two voids of the same value
CHARGE_ID CHARGE_ID_THAT_VOIDED_ME ROWN
10138466 10138459 1
10138467 10138460 1
10138468 10138462 1
10138468 10138461 2
10138469 10138462 1
10138469 10138461 2
10138470 10138463 1
As you can see I will not get a proper set of values to record the Charge Id that voided me for the charge Id to be voided.
I am having a real issue with this one.
Please help

Answer 1

So many looked and were not able to help.By all mean I hold nothing against anyone. Thankfully I never give up and this is what we did:
1. A table called CHARGES_N_VOID_STG was created
2. in the declaration section of my procedure:
cursor c_voids is select * from CHARGES_N_VOIDS_STG;
Then after the BEGIN:
          If there were any voids in these clean charges, then you must set the valid
          record that it is offsetting to a transaction type code of 2
EXECUTE IMMEDIATE 'TRUNCATE table CHARGES_N_VOIDS_STG';
--Insert the voids that have not been processed.
--If the CHARGE_ID_I_VOIDED is null then it has not been processed                
INSERT INTO CHARGES_N_VOIDS_STG
(     CHARGE_ID_Void,
IMPUTED_SB_MAP_Void,
BATCH_ID_Void,
RECORD_SEQ_Void,
ENCOUNTER_ID_Void,
SERVICE_CODE_VOID)
SELECT     DISTINCT
v.CHARGE_ID,
v.IMPUTED_SB_MAP,
v.BATCH_ID,
v.RECORD_SEQ,
v.ENCOUNTER_ID,
V.SERVICE_CODE
FROM      CHARGES v
WHERE     v.TRANSACTION_TYPE_CODE = 1
AND          v.SOURCE_SYSTEM = 'MM'
AND           v.CHARGE_ID_I_VOIDED IS NULL;
--For each void record in the temp table..
FOR r_void IN c_voids LOOP
--Update the stage table records with a valid charge to be voided          
UPDATE      CHARGES_N_VOIDS_STG
SET          CHARGE_ID_Valid =
(     SELECT      MAX(CHARGE_ID) AS CHARGE_ID
FROM          CHARGESDS.CHARGES
WHERE     ENCOUNTER_ID = r_void.ENCOUNTER_ID_Void
AND          CHARGE_ID_THAT_VOIDED_ME IS NULL
AND          (IMPUTED_SB_MAP + r_void.IMPUTED_SB_MAP_Void) = 0
AND          SERVICE_CODE = r_void.SERVICE_CODE_VOID)
WHERE     BATCH_ID_VOID = r_void.BATCH_ID_Void
AND          RECORD_SEQ_VOID = r_void.RECORD_SEQ_Void     
AND           ENCOUNTER_ID_Void IN
(     SELECT      ENCOUNTER_ID
FROM          CHARGESDS.CHARGES
WHERE     ENCOUNTER_ID = r_void.ENCOUNTER_ID_Void
AND          CHARGE_ID_THAT_VOIDED_ME IS NULL
AND          (IMPUTED_SB_MAP + r_void.IMPUTED_SB_MAP_Void) = 0);
--Update a charge with the record's charge ID that voided it and change the trans type code
-- to 2 and last mod and last modify process id
UPDATE      CHARGES
SET          CHARGE_ID_THAT_VOIDED_ME = r_void.CHARGE_ID_VOID,
TRANSACTION_TYPE_CODE = '2',
LAST_MODIFIED = sysdate,
LAST_MODIFY_PROCESS_ID = pCHGDS_PROCESS_ID
WHERE      CHARGE_ID IN
(     SELECT      MAX(CHARGE_ID) AS CHARGE_ID
FROM          CHARGESDS.CHARGES
WHERE     ENCOUNTER_ID = r_void.ENCOUNTER_ID_Void
AND          CHARGE_ID_THAT_VOIDED_ME IS NULL
AND          (IMPUTED_SB_MAP + r_void.IMPUTED_SB_MAP_Void) = 0
AND          SERVICE_CODE = r_void.SERVICE_CODE_VOID);
END LOOP; ----For each void in the temp table..
--Update the voids in Charges with a value that indicates the void has been processed
UPDATE      CHARGES
SET          CHARGE_ID_I_VOIDED = (
SELECT     CHARGE_ID_Valid
FROM          CHARGES_N_VOIDS_STG
WHERE     CHARGES.CHARGE_ID = CHARGE_ID_Void)
WHERE     EXISTS (
SELECT     CHARGE_ID_Valid
FROM          CHARGES_N_VOIDS_STG
WHERE     CHARGES.CHARGE_ID = CHARGE_ID_Void);
We had no choice but to find the voids first then go through each and find only one records to void that matched our criteria. Some of you may have thought that the client should have put more data to make it easier to find each record but some clients are what they are and you have to make the best of it.
Thanks and You are welcome
NAMASTE