New eyeglasses turning yellow.?

SO I got a pair 3 weeks ago and when i went to get them adjusted they were nice enough to order me new ones since my frames already had a slight scratch on them .

SO I came back to get my other ones . Everything seemed fine since they are the exact same pair Target ordered me .

However after the second day they are turning into a yellowish tint on both lens .

Can that be normal the glasses were cheap $99 lens included .

I would hate to take them back after I been there 3 times and there customer service has been great . I don't want to be a pain lol . Also it been pretty hot here in TX lately not sure if that has anything to do with it. The tint looks even to weird.