changing colors

[sklr]

so i posted a gecko that i got from the pet store a few weeks ago to find out if it was a leucistic but i found out it was a pattternless
but now its changing colors and getting a milk mustach its like a white stripe that starts at the tip of the nose and ends near its eyes do is it still a patternless?
i know its not sheding its been like this for a while and my other three geckos shed within at least a few days when that start turning a whitish color

http://i109.photobucket.com/albums/n43/aazz--/IMG_3446.jpg

http://i109.photobucket.com/albums/n43/aazz--/IMG_3439.jpg

http://i109.photobucket.com/albums/n43/aazz--/IMG_3468.jpg

http://i109.photobucket.com/albums/n43/aazz--/IMG_3470.jpg

i was also told it was just a patternless but it was really dark and shouldnt be that way but ive had her in perfect temps same as my others but shes not getting any lighter anything i should do differnt?