We currently are experiencing some technical difficulties but expect it to be cleared up later today.
Items that are supposed to have free shipping (registered mail) are not giving that option and shipping is being charged. This only affects the monthly purchases.
If you are trying to order a monthly product currently but are not getting the free shipping for registered mail, please proceed with your purchase and we can either refund the shipping to you or apply it to your next months purchase.
This should be fixed soon.