species authorship causes GBIF accepted infraspecific taxon not being matched?

[abubelinha]

This is the GBIF backbone accepted taxon: https://www.gbif.org/species/7423643
I am passing 11 as data source:

• gnverifier query including species authorship + subspecies authorship (fails):
  https://verifier.globalnames.org/?all_matches=on&capitalize=on&ds=11&format=json&names=Linaria%20polygalifolia%20Hoffmanns.%20&%20Link%20subsp.%20aguillonensis%20(Garc%C3%ADa%20Mart.)%20Castrov.%20&%20Lago

• gnverifier query removing species authorship (success):
  https://verifier.globalnames.org/?all_matches=on&capitalize=on&ds=11&format=json&names=Linaria%20polygalifolia%20subsp.%20aguillonensis%20(Garc%C3%ADa%20Mart.)%20Castrov.%20&%20Lago

Thanks
@abubelinha

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EDIT:
I constructed the above queries from the verifier.globalnames.org interface form textarea, and selected output=JSON
That gave the results I linked above (containing a names= parameter).
Now that I went to the api interface I am a bit confused since I don't see which form should I use how to construct the exact same output.

Instead, I see a verifications/names menu entry which seems to work better and match the name I was looking for.

https://verifier.globalnames.org/api/v1/verifications/Linaria%20polygalifolia%20Hoffmanns.%20%26%20Link%20subsp.%20aguillonensis%20%28Garc%C3%ADa%20Mart.%29%20Castrov.%20%26%20Lago?data_sources=11&all_matches=true&capitalize=false&species_group=false&fuzzy_uninomial=false&stats=false&main_taxon_threshold=0.5

Could you explain those differences?

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EDIT:
gbif-api species/match issue with the same taxon name
Same problem. Just out of curiosity, do GBIF and gnames match names in a similar way?