When you scry for the human council member, the game resets portions of Aleroth. Mardaneus gets locked in his house, the ladder in the well is removed, a key is placed, etc. Perhaps this takes out the traps, as well?
[color:"orange"]they are now in my inventory are they going to work on me now?[/color]
If you are referring to the traps you set, I think you did not use them properly. AFAIK, traps can not be recovered after being used.
Select Deadly Gift as your right click function, and a menu bar will pop up with icons for all of the trap types you have in your inventory. Left click on the type you wish to use. Right click somewhere on screen to release a trap.