I will give a shout-out to the hero of this conversation, though: this community.
Someone in the replies respectfully pointed out that I was spreading bad info.
Mastodon post editing let me notify everyone who reposted or favorited the OP that there was a correction.
And shout out to the OP for raising this issue to my attention in the first place. That’s important too. We can’t get everything perfect on the first try in our social media posts, but that shouldn't stop us from communicating! I wouldn’t have learned any of this if it weren’t for them.