Differences in Sprints Between 2 Teams

I have an issue. I created a Team under a pre-existing Project Team. I don't know why the different in the images below. I have been creating sprints under the pre-existing Project Team, but they're not showing up under the functionally focused team I created.

Pre-existing Project Team

This is for the team I created as a subset of the project team. It's showing Dec 31st as the current sprint, when the current sprint should be Sept 2nd - 15th as shown above.

https://preview.redd.it/pchxgr57gbnf1.png?width=648&format=png&auto=webp&s=264b35503e8df90b0a423a1e80126441181a83b2

Can anyone help me understand why the sprints I have been creating in main pre-existing project team/can't be seen via the team I created? I also see this.

https://preview.redd.it/5ik5wdz7jbnf1.png?width=1352&format=png&auto=webp&s=ecb36ebdfa517c7bb36afb6c9c2edd448395c476

Please let me know. Thanks.