Sort order in the list is

captial letter names

small letter names

It is very difficult to control. It should be regardles of capital or small. As you use in many other cases

I am working in a great project with Peakto but it very difficult to work on the files, as in my computer list, all the catalogue files are sorted regardless. 

So please change this as soon as possible. This way Peakto is close to useless to handle my files (I have over 600 catalogues in Aperture and similar in Capture One