color changes between docs with copy & paste in Illustrator CS6
designer copies & pastes a rectangle, that has a gradient fill, from one file to many new files. each time the gradient color changes. not a lot- but enough to make a red turn orange. i have not personally witnessed the c & p, but i have checked the colors on the gradient sliders & they are different. can this be possible? or am i being punked? any help will be greatly appreciated!

