If someone in a mom group said "You don't know us but we know you", would you be freaked out?

I moved to this town a few years ago and I know literally no one. My daughter was born in May 2024 and I've been trying to get to know people but it's been hard.

Last night I went to a mom and me group with over 50 moms. I introduced myself to a few moms and then I started feeling like people were talking behind my back. I got weird stares from people and people were saying weird things like "Oh you don't know me but I know you" or "Oooooh YOU'RE Desiree. Nice to finally put a name to a face".

I have no clue what I did wrong. I messaged the organizer with a few names I picked up and asked her if there was something I needed to talk about and she said she'd reach out to them.

It's a little town so I'm wondering if that's just the way it is?

Edit: I reached out to the organizer and she said it's a small town, and she sent me screenshots of messages she had with me from Facebook Marketplace. Then she said "You're building a reputation for yourself. It's a small town. If you're going to give people fake ratings for items you didn't buy, expect backlash. Don't be a bully when you message people either. People talk and share screenshots around here."

Backstory: when my daughter was born I was trying to pick up stuff but everyone kept saying no negotiations so I gave them one star because they wouldn't even say it nicely. It would be like "If I wanted to sell for $5 it would be listed for that price". Ok but I'm literally just asking. I told that to the organizer and she sent me a screenshot of a message I sent a girl and my point is very valid. She didn't disclose that it was clothing coming from a home with cats. I told her so people might be driving over half an hour to meet you only to find stuff covered in cat hair and stinking of cat piss? That's not respectful of our time. Disclose that in your listing. She told me that there was no reason to be rude but I'm making a valid point! As someone who doesn't have cats, I want to know that before I get there and I shouldn't have to ask.