So I’m making a homebrew subclass and it has a spell list and when I create a character with this subclass it gives me a list of spells from every spell in the game but as soon as I go up a couple levels it removes the choices and works properly anyone know how I can stop this?

I’m not entirely sure what you want it to do based on what you’ve written, so I’m not entirely sure how to help you other than to direct you to the Homebrew Subclasses & Species FAQ #s 13-15: (https://www.dndbeyond.com/forums/dungeons-dragons-discussion/homebrew-house-rules/131411-a-homebrewers-how-to-faq). If that doesn’t sort you out lemme know and I’ll do my best to help you.