Exactly what Bill said, it is much easier to find neutral going from 2nd down. A little bit of practice and it will become second nature. The 525 is a hard engine to find neutral on and is this way in the dirt bike also. Once you get several tanks of fuel through it it gets easier.
Not sure what to tell you about the dealer though. Sounds like they are just digging for a problem and $$$ out of a warrenty job. Did you notice the clutch slipping when you had it? But let them replace the clutches and finding neutral will get easier for you with more riding time.
One nice thing about it though I have never hit neutral when going up through the gears like some other bikes have a bad tendancy to do.
2007 Outlaw 525 (#315Q) AC Racing Blackline ProPeg nerfs, Wilson Racing suspension, Precision steering stabilizer, Flexx Bars 15*, Rath Racing anti vib mounts, Rath Racing MX grab bar w/supports, Oury, Pit Posse Outlaw shifter, Vapor computer, JD Jet kit, big O-ring, YFZ throttle mod, Pro design filter, CT Racing full exhaust, RAZR 2, for sand-20x10x10 Edge on Douglas .160.
2007 Predator 500 LE
350 Raptor, 2008 250 Raptor, 2006 Jetmoto 150, 50 Raptor
2007 Outlaw 90(#384M) 2008 Class A 14 and under state champion
2006 Predator 90 (#705M) 10 and under 2nd place in state