I doubt this evidences a bug. As Jeebs says, I've had residual XP after logging back in from a previous RP session.
One thing I wonder about, though, is the absence of the "Progression by Roleplay" message in your log. Usually when I get the "Experience Gained" without the other first, I assume a DM has given it to me for some reason. But since they changed RP XP with the last hak, it might be that the first message isn't always displayed anymore.