Thanks, I'm on it!
[edit] Ok, internally the texture coordinates were not optimized for the main obj-file, only for subsequent channels and this caused that error. Your test.obj file contains 14018 texture coordinates but is not optimized (duplicates removed), this can be reduced to 1889. If this was the original model (from Ubi), then they haven't optimized it real good
If this was imported with Pack3D earlier, maybe it was responsible for it.
I will let the optimization feature run on the main model as well in next release. I just did that locally and I got the same number of texcoords (1889). In the mean time, you can try if your 3D studio can remove the duplicates.