This is an interesting little situation. I believe you to be correct but it goes much deeper than that. When I tie RBI to ground it not only lights up all the segments, but it will not let the number selected be displayed. If I tie BI/RBO to ground it blanks the display and nothing is diplayed. I have tried everything I can think of to get the zero not to display while at the same time getting the selected number to show up. I have not been able to do this. Therefore your statement is correct that it not working properly. This will have to be one for NI to look at and see what they may have up their sleeve to get this to work correctly.
I never really noticed this as usually the zero never bothered me when doing my counting circuits. Thanks for bringing this to the forum's attention.
