Late jumping onto this thread. This is a great forum. Lots of very intelligent, thoughtful, helpful individuals trying to diagnose and fix a problem based on sometimes limited information. Hard to do.
The oil mark seems considerable so more than a light drip, more like a seep and it been going on more than two weeks. Oil spray evident on floor pan so leaks while driving. The exhaust may have burned the oil off but would still leave a deposit or stain.
Is it possible that this trans has been overfilled at some point? The indicated angle of driveway isn't severe enough for this much leak without a mechanical problem or overfill so I would level the vehicle, check trans fluid level, put a piece of cardboard under assumed oil leak area while level and see how much it leaks. If it still leaks (any), and the fluid level is correct, then remove driveshaft and replace the seal and check the yoke for any wear on seal surface.
There is no reason this should be leaking that much oil without seal damage or the wrong seal or a problem with the yoke.
When the correction is made, let us all know what was found. Helps others.