On your 1st question, this is normal na krub as, the data from "Monthly Database (Fruit Juice)" will have some miss match from the "Weekly KAD" as Weekly KAD has their own start date for each week which could be Wednesday, Friday or etc.
This start date for each week could create some miss match in Data krub.
On your 2nd question, this is also normal na krub. Because the Weekly KAD has total period