Half way there
Ive never has reports of Credits not coming through Arnold.
What format of file did you download (e.g. csv, QIF OFX)?
Are they appearing in the Staging screen?
If no, I'd need to look at the file you've downloaded to see what's going on.
Use a normal text editor (Notepad is fine) to edit your downloaded file.
Edit out any personal details and edit amounts if necessary.
I'm looking for some Credits and some Debits in the file.
You can edit and delete most of the file, leaving at least one Credit record and one Debit.
Then please email to me as an attachment.