It's coming through with the top level archive directory still there.
$ zcat ~/backpan/authors/id/R/RF/RFREIMUTH/RandomJungle-0.05.tar.gz | tar -t
./
./RandomJungle-0.05/
./RandomJungle-0.05/Changes
./RandomJungle-0.05/lib/
./RandomJungle-0.05/lib/RandomJungle/
./RandomJungle-0.05/lib/RandomJungle/File/
./RandomJungle-0.05/lib/RandomJungle/File/DB.pm
and so on
It's coming through with the top level archive directory still there.