Hi Steve:
We are glad to understand the issue to such detail. I agree with you that there might be some detail that we didn’t aligh 100% with arduino that caused this problem. With your experiment, it is clear that Seeeduino contributes to this compatibility problem. We will dig further to understand the root cause and get it fixed.
Thanks again for lifting this issue!
p,s. the iRobot Create is so…awesome!! I would buy one my self for sure! ;D