French language Q&A Forum

L'Académie officially changed the rules on this a couple of months ago: https://www.france24.com/fr/20190228-academie-francaise-feminisation-langue-metier

As recently as 2014 they said the feminized forms (professeure, écrivaine, etc.) were "véritables barbarismes", but now their use "ne constitue pas une menace pour la structure de la langue"... They specify that the e at the end must never be pronounced though, so it's effectively just a spelling change.

In the exercise “La Super Chambre de ma Fille”, I filled the blank in the following sentence with the word “affiches” for “posters” but it marked my answer as Incorrect and said I should have used the word “posters”.   Doesn’t “affiches” also mean posters?

elle a accroché des affiches des Avengers 

Is that wrong? Perhaps you can't have two infinitives together? I thought faire des was the way to express going shopping.