For some reason, Ooma took the initiative to update the CNAM database records. First of all, There was no reason to do this (once something is in the database, it is in until changed or removed). But the problem is this: the name on the credit card was used for the new CNAM change order, not the billing name, account name, or what is shown for "Name displayed on outbound calls."
It is not like the wrong CNAM is a big deal for the next week until it is fixed; just the name of another family member.
I sent a support email to ask for an update to revert to the correct old CNAM record. We'll see what happens.