Toyota Repair: 1996 Toyota with Rear Main Seal Leak, sway bar bushings, rear sway bar

Question
I recently had my 1996 4-cyl Toyota Camry at a Toyota dealer for service.  They replaced my motor mounts and my rear sway bar bushings. The car only has 82K miles. It doesn't get driven very often. A few days after taking the car home I noticed some leaks under the car. I took the car back to the dealer and they said that the car had the following leaks (rear main seal, trans pan gasket, dist bolts).  None of these leaks were found previously.  I asked if what they did last time could have caused these leaks.  They told me nothing they did could have caused these leaks.  Do you think this is true ?  I can't believe I'm so unlucky to have these 'new' leaks begin shortly after the last service. Especially the $1200 rear main seal problem.

Answer
I don't beleive that they caused the leaks during the service but it should have been pointed out and recommended as a repair at that time, these leaks must have been there when it was there for service and possibly were not noticed or ignored. On the other hand if the leaks were there before they should have been obvious to you as they are now.