System automatically add/less the whole voucher amount as difference amount while entering next vouc

Hello,

We are on platform 9.1.4 JD Enterprise One, we have observed below problem while booking voucher in P0411

1.For example we entered voucher amounting to INR 5000 &  before posting we need to change the amount , system allow to change but from next voucher entry it's shows as pending amount for distribution i.e. when we entered next voucher for INR 10,000 , system show amount to distribute INR 15,000 ( 10,000 this voucher + 5,000 earlier voucher)

2. If by mistake in Payment without voucher entry some one ignore the same & proceed for payment , batch goes into error & need to clear  by SQL only which increase unnecessary work &  lead audit query.