I don't know why I haven't posted this question before, as it's been bugging me for at least 10 years.

When I run a 1099 Summary or Detail report, it seems to selectively ignore the "Only 1099 Vendors" option.  It doesn't include every vendor over the threshold, but quite a few of them.  To make it print correctly I have to customize the report to select only the names that I know belong there.

I figured it was a bug in the program, and every year I'm surprised that it hasn't been fixed.  Any ideas?