Sequence Drag & Drop in Storyline?

Hi Terri! That sounds like a fun interaction! Have you tried using separate hotspots for the drop targets of each individual item in the sandwich? That way you can specify in your question editor exactly where the correct drop location is for each item. Want to attach a copy of your story file (or at least the sandwich slide you're working on) so that we can take a look and make some recommendations for how to build the behavior you want?