Hi,
What you have done in Config of CCA is right, now when Fi consultant have uploaded AR he must have mentioned in his document type the correct CCA, as you mentioned he has mentioned dummy CCA which is not correct,
if you want the correct receivables to reflect in FD32/33, FI consultant have to re-run the AR upload with correct sales area wise CCA. ( there is a option of choosing CCA while uploading AR)
let me know if you are able to do it.
Thanks,