Sometimes the Price to be Paid is not updated when the user changes the amount to be bought/sold

[ceilican]

As shown in the screenshots below, the amount to be paid for 3500 SOD should have been ~1 ETH. But, in in one of the screenshots, the amount got stuck in ~10 ETH. Editing the amount to be bought makes the problem go away.

I suspect that, when the user edits the amount to be bought very quickly, the re-calculation is not managing to react to every change in the amount.