Chaining Gangplank barrels gives you CS

So i noticed this after playing a few gangplank games and seeing that my in game cs at the end of the game wasn't the same as my cs shown in my match history. This happened every game for 4 games so i went into a custom to test it. It looks like only chaining 2 (or more) barrels gives you a cs, destroying just 1 does not. I don't know whether destroying multiple barrels gives more than 1 cs as i have only tested it on chaining 2 barrels. This does not give you any gold (unless you are killing creeps with it) however it does increase your cs counter in game. Sorry the video is very short but i have seen this consistently over all 4 games.