I reccomend that you use a hand history converter, such as the http://www.cardschat.com/hand/
, this will mean that you are more likely to get replys and comments that you are looking for!!
Regarding the hand, This seems like a one of two lines. Either he is trying to induce action and force a raise from you as you may percieve his min bet to be weak. However i see this unlikely because you have such a high cbet percentage that this line would not be as +EV as a c/c c/r would be. Therefore it seems much more likely to be a move uasually made at lower stakes where they are trying to see the turn as cheap as possible as they are drawing. Just try and extract value while you have the bests hand, rasie to .40