Entity Custom Sounds Switched

Hi Guys, I'm Ronaldo, Good, I'm creating the mod called: All everything, It was the day before yesterday that I invented this mod, this mod includes unofficial blocks, ender mobs, tv globo mobs, skeleton and zombie mobs and etc. I created the mob first called Pingu, I put the texture, the biped model, the behavior and etc. I resized the biped texture by 64x32 by paint.net, and selected the custom sounds, his sounds are NOOT NOOT !, and another, I invented the mob called EnderCreeper, which is from the end, I took the texture, the Creeper model , and the custom sounds, then I saved the workspace, I exported the .jar mod, and tested it on minecraft, there before I created the EnderCreeper, the pingu sounds were normal, so when I spawned the endercreeper, they were other sounds, but the sounds of the pingu are the same as those of the endercreeper, I think they are changed or is it a MCreator bug, can someone help me?