Thanks for the detailed and valuable reply. I have already done the replacement of the seal but found the work more difficult than other cars where I just replaced the timing belt. The combination of the peculiar and diifficult to squeeze hydraulic tensioner, the removal and installation of the force fit crankshaft sprocket (initially thought the leak might be there), the warning of not turning the camshaft or crankshaft because of the interference engine, a slightly seized alternator tightener bolt, the tightness of working between the engine and the right body frame, and having air conditioner pipe and power stearing hose constantly in the way made the repair a nightmare.
Looking at your report and my experience with the crankshaft sprocket, when the seal pushes out it is stopped from coming out all the way by the sprocket (a guess) or the flywheel due to the close proximity of these parts to the engine so the seal does not leak as fast. The camshaft sprocket is farther from the head and allows the seal to slip out completely. There is an oil jet streaming oil on the seal and camshaft for seal lubrication so when the seal separates completely from the head, the oil leaks out at maybe a quart in 5 or 10 minutes. Needless to say since the car wasn't towed after this oil leak started and the engine light was on, this car was run without oil for quite a while. Right now it sounds OK.
Looking at your experience, I have deduced the following. I have only worked on seals for grease packed brake drums, trailor axle wheel "things" for mounting tires, and a rear differential pinion seal a long time ago and all the seals were metal rings making metal to metal contact with the well that it is force fit into. The Neon camshaft seal is a metal ring with a neopreme rubber coating with gripping ridges molded into neopreme rubber where the seal sleeve is force fit into the well it sits in. After 5 or 10 years, this neopreme coating apears to squeeze flat losing its grip allowing the seal to inch out. Having never worked on any other engine seals, modern or old, I don't know if other seals are constructed this way and have the same weakness.
All cars models seem to have their problems and once you get experience fixing one model's problems, you know nothing about the next. I guess where other car have nuisance oil leaks over time, the Neon,s leak oil profusely from the headgasket and slipped off seals as one of their model's problems. This should be considered a disgrace to Chrysler but all the old Neon car owners just live with it.