I was trying the hunter kit out and noticed that I was able to place at least a dozen hunter traps in one area when the feat suggests I can place a maximum of two. Each trap seemed to still be functional, as they were triggering even long after I had left that zone. Traps are a great feature and at level 13 don't seem overly powerful for the suggested CR areas but I'm not sure if setting so many traps could impact something else.
Hunter kit gets a unique feat to set a trap that is different to the set trap skill and it places a unique trap at your location.
Please let me know if I can provide any further information.