Problem importing article to Folio Builder: only the Portrait layout appears.

I havea folderwith both versions, horizontal and vertical (as you can seein the pictureI send) but in the Folio, when I import the article, only the horizontal layout appears. Why?I'm desperate! Alreadychangedfolders, already gavedifferentname, andtheFoliojustshowsmethePortraitlayout.

Please help me!

Thanks

Marta