It sounds like what it is--Scott Yee singing Lyin' Eyes. And there's nothing wrong with that.
The drums seem more prominent on this cut, and there is no problem with the vocal harmony.
I'm pretty sure the Eagles released two versions of this song, one with a couple of the verses cut out. I often drop a couple when I do it, depending on whether the audience is dancing, listening or yawning!
Thanks for posting this. The SZ was getting BORING there for a while.
DonM