Got my key from Groupees, so I'm fine with not having a second one here :)
But itch.io should NOT be sending emails telling people that Steam keys are available if they are not.
It's not itch.io sending emails really, it's just me, a guy trying to figure out his first steam release. Don't blame itch, blame me. I first though itch.io would handle the keys, but then I discovered groupees bundle purchases get their keys from groupees separate from people who bought directly from itch.io, so that's where those keys went.
Very sorry for the confusion!