If you notice at the bottom of your shipment notification email that multiple tracking numbers are listed, then yes, you have multiple packages in transit to you. This is primarily for one of two reasons:
1: Your order shipped from multiple locations. In the US, we have a warehouse on each coast, and if one location runs out of something, the other will have to pick up parts of orders for it. Each product page has a listing of which warehouse has what product available so you can be aware of what to expect.
2: Your order was large enough, or contained an odd combination of items, to merit shipping in multiple packages. Anything more than a case will have multiple shipments. Odd numbers of packs will often do so as well, as our boxes are optimized for 1, 2, 4, and 8 packs.