You have a picking problem, when the player collide with, for instant "Barritaentera" you destroy "Barritalzquierda" and "BarritalDereccha" as well. (Sick names btw ) But you never pick which of these to destroy, so it just automatically pick all of them and then destroy them. You have to pick the correct ones of "BarritalDereccha" and "Barritalzquierda" as well, and the same goes for all of your "On collision" events.
Ohhh ok! And how can I pick which ones I have to destroy? Thanks for the tip btw
Regarding the names, haha they're in spanish as I am spanish!