How do i respond/has any one had this happen?

Hey all!
so I hope I’m not the only one, because it’s been really frustrating and I feel like it’s people have lost their manners...
I keep having people come up to me and say “where’s my invite” or “so I’m inviting this person as my plus one” or “I can’t wait for your wedding!” I’ve also gotten “make sure you sit me next to so-and-so”.
Its hontesly been really upsetting to me to have people saying this stuff. Like, am I overreacting? I just think it’s rude that people are telling me where I should sit them and assuming they’re invited or are getting a plus one. (And yes, save the dates have already gone out and the wedding is 3 months away-so I’m just confused...if I haven’t talked about the wedding with you and you haven’t gotten a save the date, why are you saying these things?)
please tell me I’m not alone 😓