zistemo allows you to create one transaction for several invoices.
To do so, you should click on the ‘Create transaction’ button from your bank account page

Then in the ‘Transaction type’ field, choose ‘Payment for an invoice’ and in the ‘Invoice payment’ field choose all the needed invoice payments:

OR
On the Payments page, choose several payments and click ‘Create transaction’:

And on the next page pick the same account in the ‘Bank account’ field: