No, fuck no. There’s nothing wrong here!
Say your DS is in a class of 25 and it’s a party at home OR somewhere there’s a cap on numbers.
Imagine you had 10 invites to give out.
That means you start out by leaving 15 kids out.
If of the 10, five can’t manage then a further 5 would go out to those not invited yet. 5 kids are then left out.
If the day before a kid gets ill and drops out i would then either accept less than all 10 would appear or I’d ask my kid to nominate a kid not yet asked. 4 kids are left out.
There will always be kids left out.
Yes I can get why you may feel a bit “on the subs bench” but an invite is an invite, no?
With respect, get over yourself lest your kid end up with some weird misplaced sense of needing to be on the A-list or it’s a snub.