Amber it has been like that since this forum system came alive and users started getting emails of discussions they are following and or have replied to.
Nested, Threaded, replies take on the first line, or part of the first line, of the Nested/Threaded reply as the subject line. It has now been over 4 months and no change to that behavior.
Also there has been no posts in quit some time by the people, Adobe employees, that were tasked to setting this Social Media site up. None that I can find since early December ( at least not in the public forums. Maybe in the restricted forums that I don't have access to anymore since being retired from the ACP program). In fact the lead guy, I think his user name was dave_m_t (the person that lead the Adobe connect sessions on using this new forum system (excuse me this new Social Media site) doesn't even show up for searches of Users). So I have no idea where he has gone or he no longer posts in the general public forums.
This is no longer a Support Forum. It is now a Social Media platform.