Have you been prompted for multiple TANs for 1 action?
This could happen depending on the setup from the bank side.
If you are importing a Bank Connection which has multiple accounts and you are asking for history longer than 90 Days then, the Bank is making sure that you explicitly approve access to each of your accounts.
If you still have questions about it, please bring it to our attention, firstname.lastname@example.org
We would be happy to analyse your request.