The below mentioned note seems to be more relevant and follow given solution in the note if it can help to your requirement.
396791 - Credit release of sales orders with third-party items
also check the below relevant notes may help you.
48797 - Releasing blocked sales orders loops during check
100861 - Release of blocked sales orders - loop check
Try other option like giving the change access to super user if the end user frequently changing the values with out any valid reason so that when ever it require any change to the sales order it can be sent to super user to update the document(i feel this is not useful because many times it require changes to the document with valid reason)
And one more option try this way, in OVA8 try to increase the fields of deviation % and Number of days to maximum so that system try to consider the values for another credit check only when the new values are exceeding the mentioned % and days.( this applicable if the price and no of days delay).
thanks,
Srinu.