Finally someone else who has the notification problem on lock screen. It's driving me nuts as its now opening the notification underneath the sensor when it unlocks when I simply want to unlock the phone. I've sent feedback to Samsung.
Not sure about the 2nd issue though, I'm not sure if you're talking about the bottom apps being smaller than the ones on the main page - that's just because you have 5 apps at the bottom so they are smaller to fit them all. I could be wrong with my understanding of your issue though.