Klarna have let us know that there is a technical issue affecting some 'Pay later in 3' orders that is causing the instalment amount in the app and notifications to be displayed incorrectly.
Please be reassured that this will not affect your instalment amount, and the correct amount as agreed to at the time of purchase will be debited on your due date. In most cases, updating and/or reinstalling the app will allow the instalment amounts to be displayed correctly.
We would of course like to apologise for any confusion this technical issue has caused.
If you are still concerned you can contact Klarna directly here.