The account type is selected as guest instead of partner when signing up. How could I change the account type?

Please be informed, when you sign up as a guest you are assigned to a placeholder Account (you cannot do anything by yourself in these kind of cases). Kindly note that you have to contact us so we change the Account related to your Contact. We have already taken care of this and changed the Account of you (Jane HANG) to the correct Partner Account.

I hope this answers your question but please let us know if you have any other questions.