Changing the shielding ground pin made zero difference. In fact, not grounding the shielding has zero affect from what I can tell. I checked all of my connections I made and everything seems good there.
Then this morning I decided to move the temp daughterboard to the duex instead of off of the duet. It appears that my open circuit is gone now but I will have to do additional testing when I get the time to do so. This is a machine I run at my 9-5 so I don't always get time to put into it depending on my workload.
Will update this thread with any additional information I get.