Hi -Jill-,
Thank you for your post.
For the pay run transactions that were linked to the old bank account but were manually paid through the new bank account, you have two options. You would be looking at reversing the pay run transaction and re-processing the payment with the correct bank account. Or you may also record spend money from the correct account to the incorrect account to transfer the balance across.
Regarding changing the default bank account for future pay runs, you can typically change the default bank account from which payments are made by adjusting the linked account from the Managed linked account screen.
Please let me know if you require further assistance. I'm here to help.
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Cheers,
Princess