"Booklet" print not defaulting to short-edge

Hi, I have been having this problem for weeks and it is infuriating. I almost exclusively print projects using Adobe Acrobat, and I'm often printing booklets.

My printer does saddle-stitch folding and stapling. When I print booklets, I always pick "Booklet" under "Paper Size & Handling" so that it will reoder the pages correctly. Then I select the "Printer..." button at the bottom of the menu and tell my printer to fold/staple accordingly. For 10 years, Acrobat would automatically know that a "Booklet" is a double-sided, short edge print. I have never had problems with this, until a month ago.

Now, Acrobat doesn't seem to understand what a "Booklet" is. Every time I print one (which I do several a week), I have to manually tell it that I want Short Edge printing in the "Printer..." menu. When I happen to forget, I get a document FULL of blank and upside-down pages.

Please help. What in the world is causing this. I have so tired of this bug!!!