Maybe you just double clicked the "send" button Maybe you touched "send" button when you were trying to refresh the page after sending 1 sMerit that's why it doubled the sMerit sent.

There are already some Member here who experienced the same issue when sending a Merit. They said that maybe it's a bug or something, but the truth is they just clicked the send button twice. When you clicked send button and the page starts to load, although the page's loading didn't completed (due to slow internet) or it happens that you cancelled the page's loading after a minute, the amount of sMerit you entered in the textbox will still be sent.