CO-PA settled Sales orders now posting debit memo's as well double

Hi Experts

Please help

We have sales orders and sales contracts which settle to PA. As of a couple of weeks ago, it has also been posting the debit and credit memos twice to PA on record type F and are still being settled C. We do have a sales type where the Billing doc does post to PA and this doesn't settle.

I hope that you can assist me.

Kind regards

Dawn