Yes, you are right. As I said: the last one wins. And that could have any value in BPM.
Taking now only the first file in a folder does not make it any better as that choice does not mean that the ignored rest features the same BPMs.
I just had a look at an arbitrary folder and that had files ranging from 85 to 145 BPM - and only 2 had the same. That is why I have not added that info to the folder name.