Yeah, the lids that are on these grills are the ones that came with them when I got them. If you look closely at the first photo, you can see how the lid on the left is more 'DOMED', (as opposed to DOOMED...LOL) while the lid on the right has a flatter top. I tried swapping the lids just for giggles, and they would work in a pinch, but they definately don't fit "right". One is about 1/4" bigger than the other.
I'm guessing one of the lids was swapped at some point because the rivets for the vent appear to be original....