When you add a bank account to paypal it sets up the direct debit mandate so that paypal can take authorised payments for any purchases you make (or pay your Ebay fees). No company eg water/electric can take funds from your bank account on a regular basis without that direct debit. However the amount shown is always the ''last'' transaction / amount that you paid to a seller via paypal.
So I would double check the date that the last amount was paid and see if you can recognise that transaction in your paypal account.
If that is NOT correct and you don't recognise it and its a second direct debit set up then query it with paypal customer services and your bank.
Advice is VOLUNTARILY given. Please leave Kudos / Solution if I have helped you.