i had similar problems before using Horizon but heres what i did to get it to work perfectly with Horizon
open horizon go to device explorer and i dont know it may be different but i know i have all my WWE 2k14 files on usb which is what i use when i load up on the game some people just copy the savegame file to the usb drive and if u did that i dont know if it'll show up differently or not
but if u like me got all ya 2k14 saves on a usb drive click games scroll down to u see the WWE 2k14 then scroll down to the bottom you see Save Game right click and extract it to any where u like. i just created a new folder on desktop and extracted it to there to make it easier to locate
once u have it extracted open up the editor and load up the file u just extracted from the usb after u finish modding what you want to make sure you click save.
then go back to horizon and click and drag the save game to the left and release then on bottom right you see contents click it
on the right you see save game right click and hit replace and go back to where you extracted the file it will be the save game data with all the mods once you do that it'll take a sec or 2 then it'll pop up replace successful or something like that then click the save rehash and resign and take a few sec and pop up it was successful and there you go close program take usb out and load it up on 360 and it should work perfectly. also took me a few to find em but to find all the unlockables dlc's npc when you go to choose your wrestler go down to the divas open it as if your going to choose a diva and just scroll up or down and you'll see all over caw men women npc etc. the attributes and abilities don't work online and you can only play as the managers when playing online. and some of the npc cause the game to freeze up and i also noticed after playing with a modded wrestler at the end of the match just freezes crowd and all still moves around and make sounds but wont let you do anything have to restart the game.