Look what they say about authenticity of their paracord at CampingSurvival.com (a nice disambiguation).
"We sell you (& have always sold you) 550 Paracord which is the commercial version of the mil-spec Mil-C-5040 cord. Your 100' & 50' coil label refers to it as "military style"- which is a common description, but can be mis-interpreted. We also make the mil-spec cord & make it to the military spec & sell most of that to the military. However, some of it is also sold in the commercial market. It also tests 550 lbs, but is made from more expensive yarns & therefore is a higher priced item. When we are selling either, we always clearly label it either 550 Cord or Mil-C-5040 Cord.
This is a problem that is not limited to just us. This confusion is experienced by all of our competitors that make either of the cords too. The real shame is that not all of our competitors produce a quality commercial cord that tests 550 lbs. Some use inferior raw materials & just try to undersell everyone else."