Perhaps it is faulty?
Wouldn't jump to an S6, how about a z5? A friend hated the S6 Edge, too footery and terrible battery life!
I can also vouch for the S6 Edge being pretty terrible in the battery life department.
Had it out and about the first time today and took a couple of pictures at Ibrox from todays game (Rangers vs Hibs). Was really impressed with how they came out.
I'm still naked on the handset (3 days in of course) but of course the above pics are worrying. However I went for the Black so I'm hoping it will last quite well as it feels great in the hand.