Order goes on block several times

Hello,
We have a problem with Credit Management in FSCM. We are having with sales orders being credit checked when changes are made to the order that should not invoke the credit checking. In certain cases (not fully identified), orders may need to be released from credit block several times once released by our credit team. Our current configuration is to go on block when a change impacts value but if sales terms, partner, order reason is changed, it will go on credit block requiring our credit team to release the order yet again. We have been trying to understand why this is happening and we would like to correct by having only it go on block if value of the order has changed.
In this case postponing delivery date for few days, adding extra text etc. is blocking the order again.