There's a bug with ext4 on the new 4.7 kernel -- rare but it happened here on an ext4 mountpoint (/home /dev/md1 ext4 rw,relatime,data=ordered) when a new file was created, the "create time" was not properly set.(2014 was written as the create year instead of 2016)
Can you reliably reproduce this and are you sure the system time was set correctly? If so, please give us your reproduction instructions.