Increment read count giving incorrect output - tsql

Question

Hi I have stored procedure with Merge statements using the cursor to count Read, Insert, update and delete with an increment read count
CREATE PROCEDURE StagingProcedure
AS
BEGIN
DECLARE #output TABLE(change VARCHAR(20));
DECLARE #Reads INT,
#Inserts INT =0,
#Updates INT=0,
#Deletes INT=0;
DECLARE #Cursor_Month NVARCHAR(10)
DECLARE CUR_MONTHS CURSOR FAST_FORWARD FOR
SELECT DISTINCT year_month_submission
FROM StagingFile
WHERE Type = 'Payment' AND [status] IN('New','Updated')
ORDER BY year_month_submission ASC
OPEN CUR_MONTHS
FETCH NEXT FROM CUR_MONTHS INTO #Cursor_Month
WHILE ##FETCH_STATUS = 0
BEGIN
--INSERT THE MAIN MERGE CODE HERE, this example
**SELECT #Reads = #reads + COUNT(*)**
FROM StagingFile bf
INNER JOIN StagingData bd
ON bf.FileID = bd.FileID
WHERE bf.Type = 'Claim' and bf.[status] IN('New','Updated') and bf.year_month_submission = #Cursor_Month
DECLARE #FilesList TABLE(fileuid UNIQUEIDENTIFIER)
INSERT INTO #FilesList (fileid) (SELECT DISTINCT FileID FROM StagingFile
WHERE [status] IN('New','Updated') and Type = 'Payment' and year_month_submission = #Cursor_BDXMonth)
MERGE INTO Table a WITH (HOLD LOCK) AS tgt
USING (
SELECT Distinct
JSON_VALUE(DocumentJSON, '$.EntityID') AS EntityID,
CASE JSON_VALUE(DocumentJSON, '$.Denial')
WHEN 'Yes' THEN 'Y'
WHEN 'No' THEN 'N'
ELSE JSON_VALUE(DocumentJSON, '$.Denial')
END AS Denial
FROM Table1 bd
INNER JOIN table2 bf ON bf.FileID = bd.FileID
WHERE bf.Type = 'Payment'
) AS src ON tgt.[ID] = src.[ID]
WHEN MATCHED
)) THEN
UPDATE SET tgt.ID = src.ID,
tgt.EntityID = src.EntityID,
tgt.Denial = src.Denial,
WHEN NOT MATCHED BY THE TARGET
THEN INSERT (ID, EntityID, Denial)
VALUES (src. ID, src.EntityID, src. Denial)
WHEN NOT MATCHED BY THE SOURCE
AND tgt.FileID IN(SELECT fileid FROM #FilesList)
THEN update
Set tgt.Isdeleted=1,
tgt.lastupdated=getdate()
THEN DELETE
OUTPUT $action INTO #output;
SELECT #Inserts = #Inserts + count(*) FROM #output WHERE change = 'INSERT'
SELECT #Updates = #Updates + count(*) FROM #output WHERE change = 'Update'
SELECT #Deletes = #Deletes + count(*) FROM #output WHERE change ='Delete'
FETCH NEXT FROM CUR_MONTHS INTO #Cursor_BDXMonth
END
SELECT #Reads ReadCount, #Inserts InsertCount, #Updates UpdateCount, #Deletes DeleteCount;
CLOSE CUR_MONTHS
DEALLOCATE CUR_MONTHS
END;
The output of StoredProcedure not syncing with the insert statement, Please could advise what this script exactly doing is there an issue in the Cursor statement under Read count not sure if this is something to incremental read count. I don't have 45 updated records seems like somewhere it's counting wrongly.
ReadCount
InsertCount
UpdateCount
DeleteCount
38
21
45
13
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