@Cyber-Gottin
it is not a glitch
Rocky heights is not Sim Springs - they do not work the same way
You can only complete the tasks in one lot, having to do it twice when the number is over 11 sims required
Take it up with support. they prefer the in-game contact method - there is a square chat bubble you can use
You can also bring it up in the official Discord or tweet at the Gurus on X
This forum is provided by EA but is designed as Player helping Player, in this case we can not do much for you
Contact support: Get there in game: green ... button at the bottom of the screen; info > online support
Or use the web https://help.ea.com/en/help-top-issues/?product=the-sims-freeplay
Or contact support via FB or Twitter, links are at the bottom of the page