You're not doing anything wrong. The HH line is famous around here for stretching, and stretching, and so on. It will stop eventually, I promise. Remember to really make it tight when you hang it.
In the HH; your head should be on your left and your feet to the right. The tie-outs depend; they aren't necessary. Many don't use them in cold weather mode so that pods or socks fit better. I recommend using them when you can.
This IS Hammock's for Dummies; welcome aboard.