From the forum news, I can tell that one user who had a significantly large monthly sMerit allocation of 849 was removed from the list of merit sources about two months ago. As a result, the total number of active merit sources has decreased from 110 to 109, and the current total merit generation is now 33140 sMerit per 30 days. I don't know who this user is. 
Since, in recent times, there has been so much drama around Symmetrick (Ratimov), it may well could have been him, since it appears that you still have him listed as a merit source, and I am in the last week or so, he has been banned from the forum.