Color distortion after iphone 5 screen replacement?

So i dropped my iphone 5 a week ago and then screen shattered. I got it replaced yesterday. Almost the entire screen had color distortion but it all went away in a couple hours.occasionally however if i swipe across the screen just right the discoloration reappears where i swiped but i can swipe right back off. This has happened maybe 3 times in the 14 hours i've since i've had my phone fixed. Will this stop soon? Also there's one spot on the screen that is distorted differently.almost like a grease mark or something but it can only be seen when the background is just right like completely white or completely black… What is this? Will it go away too? The Cell phone repair guy said discoloration will go away in 48 hours but i think this mark is different from the other distortions.

Added (1). EDIT: He said the color discoloration didn't always happen but when it did it would go away in 48 hours. And if it didn't then bring it back and they will fix it. So if the coloration is still happening in a couple days ill take it back and if the other spot is still there ill ask them about it to.

I've replaced many screens from 3GS to 4S, never a 5 though. Not one has had color distortion. So unless it's a 5 thing, sounds like a defective screen.

Take it back, they need to fix it.

Most likely screws (or outer housing) is too tight. Might also be a cable or other hardware component behind the screen pressing on the screen itself causing distortion.