If I were you, I would walk (or perhaps run) away from this "deal".
A salvage car, or one that has been rebuilt, will never be as reliable as one that has not had significant damage, and--perhaps most important of all--a rebuilt car is likely to have much less occupant protection in the event of a crash, simply because it cannot be rebuilt to the same standards that it had when it left the factory in 2003. The original structural integrity is simply no longer present.
As to asking the seller to reconcile the possibly conflicting information, I hope you realize that the amount of lying that typically takes place with used car sales is...incredibly high. Ask for an explanation if you want, but be VERY skeptical of the answers that you are given.
Used cars are like commuter buses.
If you miss one, there will be another one coming along shortly.