i was using this one and i dont know why it wont download more than 40 without merging them or just the merging in general but i am fine with it for now as i can use both the dsiware one and this one to get 80 which is enough at this moment.
i found that when downloading more than 40 only 40 would actually install and if you tried to add any more they would merge like listed above.
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it also seems to happen if you download some of them now and then some more later, even with less than 40 total