[Black Tiger]

Are these a bugs? Or do I do something completely wrong?
I changed my download directory in the settings to another download directory on my server, i removed the "." in the beginning and stated the full relative path with a trailing slash like:
/home/domains/mydomain/public_html/downloads/
Without the trailing slash, files won't be imported but then I get a error notice.

With trailing slash it works but the following things amaze me a littlebit:

1.) Files are imported in my downloads directory but not in a categorie subdirectory, this is the correct working?

2.) When setting up for the first time and filling, the column on the left with "Top Contributors" show random users with 0 uploads, amongst them are also users which do not even have upload access for the files?
I can't imagine that this should be the case.

3.) If you import the same file twice, there is no warning about the file already existing, but the file simply get's visible twice in the download section, also named exactly the same.

So if anybody can help me with mainly question 2 and 3 (and a little bit question 1)?