Hi @rickkas7 -
I was meaning to reply sooner but I was out all day and just got back.
I managed to resolve the 'issue' around D6 pin, though not sure why or whether this is intended. There is jumper in one of the two banks of jumpers that seems to cause this behaviour. If I remove the jumper, D6 functions normally. If I bridge the jumper out, D6 goes (and stays) low.
Both Eval boards I have came with all the jumpers bridged out, my mistake in thinking this would be good for 'normal' operation. 
Thank you for your efforts!
Regards, Friedl.