DMDE recovered multiple different FAT file systems

I ran DMDE on my 4TB WD My Passport and it luckily recovered close to 900gb of data. However, I'm struggling to understand why there are different numbers after "FAT" that differ from the normal "FAT16", "FAT32", etc..

I've compared each folder category (e.g. Archive, mov, jpeg, etc..) when I recovered FAT 1 and FAT 15 and each one had the exact same number of files and overall size (~900gb). So, I'm assuming the other FAT ## (*## being a number from 0 to 23) have the same number of files and overall size based on their preview contents.

What's the reason behind there being multiple FAT ## but all having the same contents?

https://preview.redd.it/iiox3vd8pufe1.png?width=632&format=png&auto=webp&s=e315fb217df4957ac3e34907a397de44a09222d3

https://preview.redd.it/akcd9vd8pufe1.png?width=496&format=png&auto=webp&s=d1f0b076eaaf45468bc8c53e85c2d4d42908751f

https://preview.redd.it/oxmf2vd8pufe1.png?width=508&format=png&auto=webp&s=4209756ee51ed5b34bfbe4c873e985cc008d3f4e

Edit: added more screenshots

https://preview.redd.it/g4q8xztgiyfe1.png?width=643&format=png&auto=webp&s=dda072959c54baddd6a81a2d7c028d06b29e6b14

https://preview.redd.it/5jck01ugiyfe1.png?width=822&format=png&auto=webp&s=b75ade929c9c6211e65098cfca56f0725eb71262

https://preview.redd.it/5aa1k0ugiyfe1.png?width=1281&format=png&auto=webp&s=b02d5fe0279d77f081a6cf4fc1fbd0dc629540ef