As discussed here (http://ghisler.ch/board/viewtopic.php?p=337749#337749):
(emphasis mine)chasbas wrote:I had actually tried this. TC decides that any Directory with a / in it really belongs in the File Types field; it concatenates the Directory value with the File Types value and puts the result in the File Types field, while blanking out the Directory field. To verify this you have make TC re-load this Rule - clicking briefly on a different Rule, then back to the current Rule, will show how the new information has been stored.
This behavior is so specific that it seems like it is done by design, rather than being a bug.
The thread i linked above also explains why it could make sense to have directory patterns with forward slashes (like, defining rules that apply to FTP connections).
(I could reproduce the described behavior with TC32 and TC64 9.12 on my Win7 Pro x64 box.)