Regarding 31cb............................ folder with part.31 inside it, make sure your temp folder is not the same as download folder.
This [1] next to the folder makes me think that you're importing nzb files to altbinz directly from browser.
You have few options:
- Select all parts from that thing you want to download and then make single nzb which you'll import into altbinz. (In the case you mentioned you for sure imported 2 nzbs, one with rar and par2 files and the other with srr/sfv/nfo)
- Use altbinz internal search tabs, select everything belonging to that thing and then press ctrl+d
- Do as you did before, but before starting download, go into download queue tab, where you'll see for sure same names as you described:
Select both collections and press CTRL+J to join them into single collection.