Am I crazy to be upset?

[Mayadevon]

I have 2 dd aged 4 and 6. There are a group of families where we have kids the same age and in the same classes in school. If there is a birthday party, say for one of the older children, then all the younger children would be invited as they are all a large group of friends.

Anyway, one of the younger kids had a party and I got a text inviting my younger dd only. I didn't think anything of it as it was being held in a party place and I thought the mum might be trying to save money by not inviting all the older kids. I brought my younger dd and noticed all the older kids there apart from my dd. The mum told me I should have brought my older dd but her text specifically left her out.

The older ds of the mum throwing the party told my dd that his mum wouldn't allow him invite my dd. I'm very upset and feel I should address the situation.
Am I crazy?

I think you should let it go. No good will come from making a big deal about this.

but her text specifically left her out

Did the text specifically say not to bring eldest? Or just omit to mention your eldest in any context?

"DC2 is invited to the party, numbers are restricted so on this occasion we cannot accommodate DC1. Thank you for understanding" (kind of thing)

or

"DC2 is invited to the party. We can't wait to see you" (kind of thing)

I bet it was the second. I bet the assumption would be that the children could come as a pair if they wanted to. You just didn't read it that way, but the other parents did.

Its no big deal. In future just send a text saying "Is there room for DC1 at the party, no problem if not" (or similar).

I feel like PPs are glossing over the part that has made OP upset. I'd definitely be wondering what her problem was too.

I would simply ask why this child was not allowed to invite your eldest.

perhaps she has a good reason not to invite her specifically (or feel like she does anyway)?

Thanks all for your replies. She definitely left my child out. She normally asks if "the girls" want to come but this time she specifically only mentioned dd2. Nothing has happened to my knowledge and the other mum knows that I would be very quick to address my child's behaviour if something had happened. I am not a "my child is perfect" person.

I too think it was just a miscommunication. Maybe she was multitasking when she wrote dd instead of 'the girls' so wasn't concentrating or whatever.