Report filtering

I would like to create a report that only pulls tasks that have not be checked done from a checkbox column, but also do not have a "-" in the done column (these are rows that do not contain tasks, rather description fields). When I filter it looks as if SmartSheet is deciphering the "-" as unchecked. Is there some simple way around this? We have 200+ projects already established so something were I don't have to modify the individual sheets would be helpful.