Actually being triggered by other people's issues is a huge part of group therapy. It's okay that another member's stuff brings up stuff in you. When that happens to me I talk about it and I preface it with, "here is how that is triggering my stuff"

If I were you I would bring up those questions in group. The T who runs my group always does group process stuff first and that is definitely group process stuff. Some of the most effective nights at group were when we discussed group process issues. Part of the power of group is being triggered by the other members in the group and learning how to appropriately deal with those issues. Then it translates into real life and how to deal with issues with others.

I think you are doing it perfectly! Good luck,
W