Hi,
I just noticed something.
In the GrovePi /Script/install.sh script it’s grabbing a copy of avrdude_5.10-4_armhf.deb from gertboard on drogon.net.
There is a newer avrdude debian package 5.11.1-1:
sudo apt-cache showpkg avrdude
Is there a reason you are using the gertboard version and not the debian package version?