I am a new used Leaf owner and just read through this whole thread. I also have a Chevy Volt and use a Clipper Creek EVSE. I was experiencing the same problems that you were with the charge stopping intermittently. I finally tracked it down to the the EVSE. I called Clipper Creek and they had me read the lights that were being displayed on the EVSE when the charging stopped. After playing around with the plug, they finally deduced that it was the EVSE. They sent me a new one since it was still under warranty. Put the new one in and things have been fine. I have had no problems with charging the Volt, and now no problems charging the Leaf. It's been about 8-9 months since replacement of the EVSE.
Cliff
2013 Leaf
2014 Volt
Cliff
2013 Leaf
2014 Volt