I was not in the right state of mind, my brain weirdly skimmed and auto-corrected grammar mistakes. I thought it was weird but I was just happy and yet busy to think about it further.
Yeah I mean when someone is happy and excited that they're going to get a job that pays $45 an hour then they probably won't care whether the employers know English or not.
This is also a "red flag" that will probably stop being useful soon, as chatgpt etc make it easy for scammers to write things that don't have this kind of mistake.
I have read that the poor spelling in scams is on purpose, it filters people out early on. Anyone who overlooks the poor spelling and grammar is more likely to continue
Just fyi, anyone can send email (a.k.a. spoofing) from @autonation.com, the harder part is correspondence from that domain - but I think you were pretty much aware of the scam at that point. Good job.