Posting of Foreign Currency transactions

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Hello,

I have a number of EUR suppliers whom i pay from GBP account. So I use the GBP account to pay supplier invoices that are entered In Sage in EUR.

In Bank feeds the transaction will appear still in the amount of EUR i.e. 602 EUR but the actual amount that has left the bank after conversion is £519.07 

When i go to bank feeds to post the supplier payment to ledger, I click on the transaction that is 602EUR and go to create. From Create I choose the bank payment and follow the completion process of all the way to the NETT Amount cell, here i enter the actual amount that has left the bank which is £519.07 and as soon as i click SAVE i get this transaction appearing in the other window next to the (Bank Transcations window), and a notification that there is an unmatched amount of £82.16 and so i can't Confirm Matches!

How do i post this foreign payments to ledger if these two doesn't match?

Kind regards

M