Mine was increased as well. The adjustment is based on the last 6 months of sMerit sent including both source merit and personal merit and the amount was multiplied by 175%.

I had found myself consistently out of source and personal sMerit and can start to increase the number of merit per post and number of posts I can merit each month.

Edit: there are now 98 merit sources and it looks like the total source merit decreased so some sources were removed.