Thanks for all the details you've given here. I'm not seeing a screenshot, but that's okay! I've got an idea from what you've described. It sounds like you've already tried the steps to resolve data damage to your company file, but feel free to review the article again to make sure you've covered all the steps.
Another option is to create and restore a portable company file. Although mainly used for creating a file size that can be easily emailed or put onto a flash drive, the way the program creates and handles these kinds of files can also help when it comes to data errors. The article I've linked explains more about the process.
You could also try deleting the bill from the Chart of Accounts, and then recreate it. Go to Company in the top menu, click Chart of Accounts (or use CTRL + A as a shortcut), then double click to open the appropriate account. Find the bill in question and now you can either right click, then click Delete Bill or click the bill to select it, then click Edit from the top menu, and Delete Bill. In this case, CTRL + D is the shortcut you can use once the bill is selected. Going into the Vendor Centre to delete and recreate the vendor, and subsequently the bill, is another option you can consider.
If those don't work for you or you're like to try other options, I recommend getting in touch with the phone support team. They can take a closer look and determine if this is something we can help you fix on the call or if our Data Services team needs to take a look at it. Reach out to our team at 1-877-772-9158. Pro and Premier agents can help 24/7 while Enterprise agents are on hand from Monday to Friday between 9 a.m. and 8 p.m. EST.
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We'll help you get back in working order as quickly as possible. Enjoy your weekend!