I pay back $10 + $.14 interest on 6/8 in ETH. If I had to pay it by 6/10 and the price of ETH fell down so that my $10.14 fell to $9.14, would I have to put more money in? Or have I already payed it fully.
If you already made payment on current price conversion rate you don't need to put extra money to cover this difference but if you will make payment today than you have to add few more amount to cover this drop of price.