Sorry Menion, I have seen this thread after writing my other post.
One of the points is: The tracks are always imported to the preset category "imported". Then you have to change the category afterwards for each file.
Plus there is no method to import multiple tracks at once at the moment. So - if you prepare for a hiking vacation with many downloaded tracks you have a lot of work by now.
Besides, maybe the usage scenario is different on a phone, but I use Locus on a tablet (Archos 70) for to hiking, kajaking and geocaching. So it would be nice to have own categories for the different things. Again sorry!