FTC is pretty clear on this, if you don't contact customers every 30 day and ask for another 30 days to ship them the product, you have to issue a refund.
Just because you put All sales are final and no refunds means nothing.

BFL's shipment representation is not clear and conspicuous. "2 months or MORE"

Business Guide to the FTC's Mail or Telephone Order Merchandise Rule

What Does the Rule Cover?

It applies to most goods a customer orders from the seller by mail, telephone, fax, or on the Internet.

What You Should Know Before You Make a Shipment Representation
Business Guide to the FTC's Mail or Telephone Order Merchandise Rule | BCP Business Center

The evidence you need to demonstrate the reasonableness of your shipment representations varies with circumstances. The following, however, is important:

    Anticipated demand. Is the demand for each advertised item reasonably anticipated?
    Supply. For each advertised item, is there a sufficient inventory on hand or adequate sources of supply to meet the anticipated demand for the product?
    Fulfillment system. For all promotions in the relevant sales seasons, can the fulfillment system handle the cumulative anticipated demand for all products?
    Recordkeeping. Are adequate records kept of the key events (see section headed "Why You Should Keep Records" for a list of key events) in each individual transaction to ensure that items can be shipped within the applicable time, as established by the Rule?


Remember: Whether you make a shipment representation or rely on the 30-day rule, your advertising should be unambiguous about when you will ship.