Is it the intended behaviour that imported glyphs are shown as missing by list filters? Even if so, why do they still show up in the list filter collection?
Good question. Import Font is there to fill up what’s missing in the target font. It can very well make sense to add glyphs that are in the source font but not (yet) in the target font. Think fallback.
Yes, but if you try to add them, it reports that the glyphs are already present in the font and that you can’t add them because of that.
Best of both worlds 