I'm assuming 19 days later you figger'd something out.
mine did that once...after I had the trans cover off and back on...the knuckle head working on it (me) got things out of wack, and somehow stuck her in two gears at once. popped the cover again (not fun with blue rtv almost cured), and loosened things back up. presto-chang-o she goes!
also...the clutch storage arm isn't flipped around and holding the clutch pedal down is it?