It's happened to me at least ten times since Christmas. I've posted something my dc have done/said and a few days later one of my FB friends have copied it. For example, I made scented homemade play doh and toddler tasted it. I posted a joke about it and picture of the kids playing. A few days later a friend posted the exact same thing with a photo of her children.
When I announced my pregnancy I did a specific announcement photo using my dc which I'd never seen done before. The next day, another friend did the exact same thing. Both are friends (people I see at toddler groups, occasionally for coffee) I see in real life and if the situation was reversed I'd feel awkward. Aibu to think the copying is a bit odd?