what's the next step your recon?My guess is the rear seal of the trans is leaking. But that could be caused by many thing. The seal could just be old, but the yoke may have a groove worn in it, or the tail shaft bushing is loose allowing the yoke to wobble around and wear the seal.
I can't see the picture either but as LS said the converter will drain back into the trans if the engine has not run in a while.I cannot see the pic. But I do know that auto trans will piss fluid after not being used for a while.