Could you please show the screenshot of the vendor panel (where current balance is visible) and vendor accounting?
The -$9 balance could appear because, for example, vendor was charged with vendor plan fee.
Thank you for your response. I could get a screenshot if you still require it. However, we do not have a vendor plan fee. At the very most there is a 8% commissions fee.
Without screenshots, it's hard to judge what's happening. I suggest that you should log into vendor account, and take a look into his accounting page - it should clearly show all the earnings and deductions, that lead to the -9$ balance.
Try to upload images but I get this: You are not allowed to use that image extension on this community.
Maybe convert image on other format and try upload.