I have noticed that in the kanji character for Husk (#710), the primitive superfluous (#300) has an extra line right beneath the crown primitive. Is that ok? Because this site (Reviewing the Kanji) does not show it. Did anybody else noted it? Does anybody know which one is correct? Thank you

It's errata.

Check page 16, or use the search function. The line shouldn't be there (and the line doesn't actually appear in the stroke order diagram).

Thank you very much for your help.