Using Record instead of Merge seems to work. I see the dup when using Merge. Try selecting GROUP 1 + GROUP 2 RECORD GROUP 3 MERGE, when the option appears. The + sign appears to be optional.
Using Record instead of Merge seems to work. I see the dup when using Merge. Try selecting GROUP 1 + GROUP 2 RECORD GROUP 3 MERGE, when the option appears. The + sign appears to be optional.