I have imported a comprehensive chart of accounts into QBO. However, the system seems to be adding (more than once) generic accounts I do not want?

Hello there, @luke-hivenine-co.

Thanks for posting here in the Community. There are default accounts that QuickBooks generates when you first create your company that can't be deleted. These are the only specific accounts that you can delete by merging them into the Services income account:

• Billable Expense Income

• Markup

For your reference, check out this article: Manage default and special accounts in your chart of accounts. It helps you learn about what accounts you can't delete. It also includes lists of accounts that you can edit, but can't be deleted nor merged. 

For future reference, read through this article: Create subaccounts in your chart of accounts in QuickBooks Online. It helps you in organizing your chart of accounts to make more detailed reports. 

Don't hesitate to visit ask again if you have more questions. We're always delighted to help.