Application Update Emails

So, I emailed colleges (ones that wanted it in an email) to let them know about a recent award I won. I made sure to email them all separately, of course. I got individual responses from AOs saying they’ll add it to my file and all that jazz. However, for some reason, whenever I open up the response from Georgia Tech’s AO, the response from Princeton shows up right above it as if it were an email thread or something. I emailed 6 colleges essentially the same message, and neither of the other 4 have this. So did I create like an email chain where they can see I emailed the other college?

Gmail? It will group them. When you click details it should show that it went to the right address.