Can anyone please help?

After several weeks of mucking about with formats, I decided that I prefer the fb2 and use Book Designer to create them.

The one problem that I have is that even though the "create TOC" and "Create TOC (all) are both unchecked, as I prefer either not to have one or to create my own, BD still seems to do it as well, as when I check using the Calibre
reader I've ended up with two.

Admittedly the second one doesn't seem to show up on my Hanlin but it is annoying.

Any ideas as to how to turn this off

:thanks: