The problem is that the CrossTable function will create weeks as text values. Further on in your script you're using the Dual function to create weeks that are numbers, but also have a textual display format.
You either need to create the same pure text values there so you get the same values as the CrossTable value generates. Or you need to create a new table using a resident load from the tables the CrossTable function created and in that new table use the Dual function to create the same week values you create later on in the script.
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