Why is a new team of 8 being billed for 9 when I try to upgrade?

[Steve Matthews]

I opened a Trello account. I formed a team including myself of 8. I want to upgrade to business but when I do the monthly billing is for 9 - Why? 

[Michael Pryor · Accepted solution]

Could it be because there is someone that isn't a team member that has been added to more than one of the team boards?

https://help.trello.com/article/1123-multi-board-guests

[Steve Matthews]

That was it! Thanks. Once I deleted the initial boards I setup trying to figure out how Trello works, the billing total was correct.