Water Spawning in mob trap

I made a mob trap, with a redstone system, i made it by watching a video in youtube. Here is a video showing a mob trap simmiliar to mine, but with the same bug though. The water simply starts apearing randomly in the "mob boxes", a guy made a video explaning the bug, here it is: http://t.co/GPIMgCkfj6
In the video he says he haven't tried the farm on survival, but i did and it doesn't work (the water continues to "appear"). Here is another video showing the mob trap model I made, the video is in portuguese and the guy just teaches you how to build it on pc but it's exactly the same one, the difference is that in pc it works perfectly: https://www.youtube.com/watch?v=PuoTyQwTDQw
Hope you can fix it!