confusing messages upon payment completion

Just did a payment for a client. Two messages appeared in response:

There are pending changes to your account. This message will disappear once these pending changes are completed.
Your payment was successfully recorded! You should be receiving an email receipt shortly.

Pending changes??? What could be triggering that message when the payment was also successful? Don't see either of these messages anywhere in the Pro Sites settings.

Also, where can I change the styling on those message boxes? Need to use Ultimate Branding for that?