I just installed WP & BP & bbpress using this theme http://themeforest.net/item/onecommunity-buddypress-theme/full_screen_preview/3713046 (I'll send this question to the theme creator as well).
In short, Groups are being deleted randomly. I think I've pinpointed it to each time I create a new group, the previous group is deleted. I can only have one group at a time. Have you ever heard of this issue? Is it a setting I have wrong with bbpress or BP? My permalinks are set to post name.