Why do parts get mixed up in the game Help Please

[Beast2013]

Hello, When I put any yz skin I've made In photo shop in the game some parts are mixed up. for example the handle grip is on one of the forks, when I colour the frame only half shows in the game and the exhaust is all twisted around (stock stickers on top of each other and look weird) . It doesn't make the bike look good. HELP PLEASE

I name it this : yz250f-2010f- Ryan Carr ENJOY RACING FINISH.
Thankyou