BuddyPress.org

I’m running a WPMU with BuddyPress on the subdomain/secblog. All users of all sites are BP members, i.e. registration is through the BP site. On the main site, when a user posts a comment, the link shows mainsite.com/members/username instead of bp.mainsite.com/members/username.

1) Shouldn’t it show bp.mainsite.com/members/username?
2) I’d like to filter into (through my child template’s function.php) comment-template.php to change the url. How do I do that?

Thank you, Tonya