So. I still need answer to this, as this kind of an issue undermines the whole stability of CB_Subs as a valid community tool.
Also, in auditing all the accounts, I found another issue that is similar and equally as alarming.
I have an account in which a customer purchased a monthly auto-renewing subscription to, using paypal. Paypal created a subscription, charged her, but CB-Subs did not activate the account. I looked in the cbsubs_subscriptions table and the last_renewed_date is the same day the customer subscribed, but the expiry_date is the day before the renew date. I looked in the cbsubs_notifications table as there are two rows for this transaction, one (I think) is the paypal sub creation and the other is the first payment. Both are on the correct day and the statuses are VERIFIED.
So it seems cb_subs did everything except activate the subscription and update the expiry date. Why would this happen?