I just signed and created a certificate with keychain access, then in the developer portal I click certificates->developer->+ and when I am prompted for What type of certificate do you need? under development ios app development is greyed out.
Does any one know why this is? Do I need to revoke a certificate?
You can only request one development certificate per user. Either log in as the user you want to request a certificate for, or remove the existing certificate(s) for the user you are logged in as. No need to delete everything.