RSVP to a party and then saying their not coming as got an invite to another one?

[Thereisnoname]

I sent invites out for my daughters party 2 months in advance ( have to give venue numbers when booking and have to book 6 weeks in advance)
They replied saying they could come. Now they have had an invite to another party on same day and time so have told me they are now not coming, with 2 weeks notice.
Am I right in feeling annoyed about this and it is rude behaviour and kid should have just come to the first party they accepted?

YANBU rude behaviour should just go to first party.
YABU its fine and they can change their mind.

Do you think it's ok if people change their minds about whether or not you're invited? Perhaps I've thought of someone I'd rather invite instead 🤷‍♀️

@BubziOwl love love love that suggestions.

Ignore people who say 2 months is too far in advance. I think that is considerate. My DH and I play sport and volunteer, so having plenty of notice to plan who does what, and when, is really helpful. We organised our DC's party around a friend who's son is 4 days older and got their invitations out early - so no clashes, and everyone's happy.