Im pretty sure this is a bug. I was playing a normal diff game earlier and since I delay building military till i get decent weapons i usually end up paying off the drengins to leave me alone. This time was no different, except when the drengins called i hit the "add" button on my side of the diplomacy screen by accident (like i was offering the money) and the text from the drengins changed from their line about their "peacekeeping efforts" to them saying "hmmm" like they are considering my offer. I assume since the text from the drengins changed like this that it tricked them into thinking i offered the money. At that point I just thought oops, and hit clear then left the diplomacy screen. I wish I had of hit send to see for sure if they saw it as a gift or still as tribute. Anyone else do this and know how they react to it?