You have two team folders. One with a project in it and one with no projects in it. Each team is billed separately (if you have any paid subscription in either team). Think of teams as folders. Each team folder can have multiple collaborators if you choose. You can also have multiple projects in a team. If you have multiple projects in a team, they all share usage limits except for rows, which are counted per individual project.
You either created an extra team at some point, or your account came with two.
@glide Explain what Teams are.