Repeats of cascading questions at different points within a survey?

Welcome to the ODK forum, @heatherb! We're glad you're here. When you get a chance, please introduce yourself on this forum thread. I'd also encourage you to add a real picture as your avatar because it helps build community!

Are you able to post your XLSForm file here (or the subset of your form that has the issue)? It will help people troubleshoot your problem.

Also, you mention "only an option to add another group" so I wonder if you're using a repeat in your form? Referencing questions that are inside a repeat is more complicated: https://docs.getodk.org/form-repeats/