There might be a bug in the code, we faced the same issue at one of the customer but with BL verison 8.0.
The live component would not update after running the discovery job, technical support suggested to apply the patch.
you should only need to re-run the discovery job if you change the discovery conditions. if you update the file, the next time you live browse the component you should see the new file.
Yes, I reran the Discovery job to see if that would have any effect.
I've been running these audits for at least a year and haven't seen this problem before.
I don't know why it's showing up now. I've put a ticket in.