Bob, I noticed this same thing sometime ago after I removed my shroud and barrel from my P.C. 460.
Once I had set the barrel/cylinder gap at .0003 and loctited it into plece,
the shroud and nut/compensator went back on in a different position.
Aside from not lining up cosmetically I've seen no difference in
performance.
I personally don't care hpw it looks as long as it shoots. And boy-howdy
does it shoot.
I only use 460 ammunition in it as I do not like the ring left by
454 Casull ammo. And I have N frames in 45 Colt to shoot 45 Colt
rounds to my hearts content.
With the pressures generated by the 460 Magnum I have no doubt
that the compensator acts as just that, and stabilizes the
muzzle when firing these hand held howitzers.
Good luck with yours.
Regards
Allen Frame