Just signed up for Kiln, and created a 'Test' repo. It turns out Kiln actually create two repos with the same name (Test & Test), although their URL's do have a different numerical postfix (Test-8 & Test-9).
I assume this is a bug, since trying to create a third 'Test' repo actually fails with "An identically named repository already exists in this group.".
In an effort to clean up the mess I tried to delete one of the repos. This also fails with "An identically named repository already exists in this group.". Hah, the system seems to be biting its own ass...
Consider this both a bugreport, and a call for help to the developers to clean up the empty repos that I can't delete.