Bryan,it's just 2 half-hitches in a doubled line. they don't have to be on top of eachother, but you need to pull them into eachother when cinching. I cinch up from the loop
running the bottom knot into the top one. trim & burn the tag end
I was using this for drag testing. got to 40# without a knot pulling, & realized I should use it for fishing. Add a wind on, & the joint is almost unnoticeable
Your description doesn't sound like a surgeon's knot that I'm familiar with. I'd like a little more info or a picture, if possible. It almost sounds like two overhand knots. Really interested. Thanks.