Sorry about the post disappearing, Nicole. It’s probably because you mentioned the printer name, and our forum software thought you were a spammer. :-(

So you’re exporting a PDF and then printing from Acrobat?

Have you tried using File > Print Booklet in InDesign?

Sorry, GREP cannot do that.

Wow, that’s pretty strange! Something is confused for sure. Does it help if you disable GPU performance in the GPU perf. pane of the Preferences dialog box?

No, that’s not possible. It’s a good idea, though! You should see if someone has suggested it at indesign.uservoice.com (or suggest it yourself)