Why are my accounts created in Sales appearing in Accounts Receivable?

By default, when accounts are created in Sales, they're synced to Accounts Receivable.

All accounts created in Sales appear in the Manage Customers page in Accounts Receivable. The reason is, the usage added when you create an account from Sales is CUSTOMER SALES_ACCOUNT. The Accounts Receivable UI (Manage Customers page) shows party records with CUSTOMER usage. As shipped, there's no way to prevent this behavior.