Weird Campaign Glitch

Has this ever happened to anyone else? My friend and I were finishing up Reach’s campaign on co-op over XBL. When we get to Lone Wolf, we both died, like normal. And both of us had completely different Spartans in the cutscene of Six getting killed. The helmet with the hole in the visor was different between when they show it on glassed Reach at the end, and terraformed Reach immediately afterward.

That’s the standard ending…

I know that. I mean the Spartan was randomly generated instead of our own Noble Six-es.