I'm replying to my original message using the fixed account! (I can't edit the orginal message because it's not mine anymore)
So now I see:
Member for 11 years, 9 months, and 13 days
They fixed it same-day! All I had to do was log out/in. :)
Here's the email I received:
When you attempted the merge, a new CurseForge profile was instead provisioned for you. I've removed the provisioned CurseForge profile and linked the existing one to your Twitch account. You may need to log out then back in to see the change.